Hot Water Recirculating Systems Hot Water Recirculating Systems. Many master (ASSE 1017) thermostatic mixing valves do not close off 100% (Caleffi's 521 and 5231 Series, for example). Pressure is the energy that moves water through the piping. Helping You to Do It Yourself! Simple to install, you will not require additional pumps for your hot water line. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. In order for your hot water spout to produce hot water, all of the cold water that has been sitting in the pipe must be pushed out of the way. Without two check valves, the system will not work properly. When it senses that hot water is returning to the heater, it shuts off the pump. 2: Hot water heater is fine; Replaced the recirculating pump. For a better experience, please enable JavaScript in your browser before proceeding. I want to hear from you. In that situation, the cold water will still flow in reverse and come out some of the hot water faucets. By visiting this website, certain cookies have already been set, which you may delete and block. A temporary bleed is needed past the outlet of the pump and check valve to vent :wink2. FREE Shipping by Amazon. One plumbing contractor commented that most plumbers don’t know how and where to install check valves. Basically, hot water rises, so if one side is hotter than the other, the hot water … When and where do we install check valves? In this video, I delve into hot water recirculating pump reviews by going over the details that you will want to know. It comes down to analyzing the pressure differentials that can occur in a piping system. Discussion in 'Plumbing Forum, Professional & DIY Advice' started by jdf405, Feb 2, 2014. jdf405 Electrical Engineer. Now, that doesn’t mean that you’ll have hot water circulating 24 hours a day through that line. Simple to install, you will not require additional pumps for your hot water line. PROFIT-BASED ENGINEERED VS. EFFICIENCY-BASED ENGINEERED . For that matter, what about any water distribution system? in Munster, Ind. The pump runs … A timer is used to ensure that the system isn't maintaining the recirculation line when you're away at work or sleeping. http://www.taco-hvac.com/uploads/FileLibrary/100-41.pdf, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. 247.66 $ 247. Problem is that you have it on the wrong side of the recirc pump line, so there's no way to put a check valve there that will stop the water from going that direction. Easy to install. For webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars@bnpmedia.com. The stated purpose of this valve is to prevent "thermal cycling", in which the heat differential between the two legs of your recirculating system cause the water to circulate on its own. One contractor’s opinion was that anytime you have a recirculation system, you need a check valve. I'm a real plumber and eplumber is a real plumber. And I will install a check valve to prevent the hot water movement in the wrong direction when the pump is off. Some plumbing contractors have told me they can eliminate the check valve on the recirculating piping by running the pump 24/7. There's an important step in starting up a new hot water recirculation system that has not been mentioned. _____ The conversation regarding check valves all centered around hot water recirculation systems, so let me limit this review to those systems. JavaScript is disabled. 2 checks and through the cold inlet. But that’s a subject of another column. When we get into a more complex system, there may be multiple zones in the hot water distribution system. The Watts Premier 0955801 Sensor Valve Kit for Watts Hot Water Recirculating Pump comes with a sensor valve, two 12 inch supply lines with fittings and two mounting screws. Carefully place the sensor on the end of the black wire from the meter onto the terminal block that the wires from the plug connect to first marked "Neu," "Neg," or "-." The ideal situation is still to install a check valve on the recirculating piping. Where they were once provided as a convenience to clientele, they are now being used as a way to cut costs ar… The other problem is you could have an overwhelming demand for hot water in the piping system. But who wants hot water out of a faucet before they get the cold water? ABOUT HOT WATER RECIRCULATING PUMPS There are two main components to an effective hot water recirculating system: the recirculating pump installed on the hot water discharge line of your home’s water heater, and the sensor valve installed on the supply lines of a faucet at the farthest distance from the water heater. Customer Support . If the recirculation system connects to the cold water supply to the water heater, the water can reverse course and go into the cold water supply. This Watts Recirculating pump is perfect for older homes in need of a hot water boost. By visiting this website, certain cookies have already been set, which you may delete and block. The purpose of a hot water recirculator is to make sure that your pipes always have hot water in them. We all know what direction of flow we want in a piping system. Note that many recirculating system pumps have internal check valves. To be clear, I’m only speaking about spring-loaded check valves. Hot Water in the Cold Pipe If you turn on the cold water and get hit with hot water instead, you may actually have a problem with the bypass valve that’s a part of your hot water recirculation system, rather than the pump itself. If you run out of pressure, the flow stops. However, when you get into larger commercial buildings, there are many zones, hence, many check valves. Wondering what that other cold line runs to. If you think you only need a flow control valve and not a check valve, I can take you to many buildings where the hot water recirculation system failed. But I’m not going to say how I do it, so as to not offend those who follow the opposite point of view. My system uses a Grudfos "UP 10-16 BU/ATLC", which has an internal valve. Water will take the path of least resistance, and if the line from the bottom of the tank has less resistance than the normal hot, yes, you will need a check valve to prevent diluting the hot with the colder water from the bottom of the tank. In that same situation, if the recirculation pump is off and someone opens the hot water faucet near the intersection, cold water will come out and probably continue to come out of the faucet. All Rights Reserved BNP Media. It is easier to install the check valve when the system is being installed, as opposed to dealing with lawsuits and installing check valves after the building is up and running. It has 3/4-inch pipe thread connectors, and you place it in the hot water line next to the water heater or near the fixture that needs the hot water. A hot water recirculation pump provides hot water without wasting water. Connecting the recirculating system check valve to the system under the sink furthest away allows the system to provide quick hot water all along the line because the hot water is circulating throughout the house. However, plumbing water distribution systems are never that simple; rarely does the water always go in the direction we would like. Protect the Earth – and your water bill in 2019 by saving up to 15,000 gallons of water – plus extra money on your heating bill! Mark, if a master mixing valve does not close off tight at the hot inlet port, you need those 2 "balancing" valves to minimize the amount of hot water going back to the storage. Turned off the recirculating pump (and ball valve before and after pump). A hot water recirculation system is designed to provide hot water to each of the home’s hot-water taps instantly. It returns the hot water back to your heater when you close the hot water faucet. … 66. Happybuy RS15-6 Hot Water Recirculating Pump 110V Circulation Pump 3/4-Inch NPT 3-speed Recirculation Pump 9.5 Gpm for Water Heater System. There are two types of hot water recirculation pumps available for you to buy. If you have two water lines intersecting, the flow is always going to go from high pressure to low pressure. Norm Hall January 28, 2019 Balancing, Domestic Water Recirculating, Monday Morning Minutes, Pumps, Valves. If the water in the piping system always went in that direction, we would never need a check valve. At the furthest point from the boiler, you’ll need a dedicated hot water line that runs back to the tank, creating a perfect hot water loop. In this way, the hot water plumbing pipes remain filled with hot water, and you do not have to wait to use hot water. As soon as the pressures equalize, the cold water again begins to flow out of the faucet. I have the Grundfos UP-10-16 B5/ATLC which doesn't have an internal check valve like yours does. Once you have installed your Instant Hot Water Recirculating System you can locate any issue you are experiencing here and we will walk you through step-by … Visit our Customer Support page to find the answers you're looking for. It connects between the hot and cold-water shut-off valves at the farthest sink away from the heater. Please click here to continue without javascript.. They are required to be controlled with a shutdown period. Getting it to flow in a convection loop is one thing, keeping it from flowing backwards during hot water use is entirely different. This article was originally titled “The direction of flow” in the June 2016 print edition of Plumbing & Mechanical. I had an interesting discussion recently about the use of check valves. 500800 Hot Water Recirculating Pump Manual Troubleshooting Watts Premier has made it simple for you to find the resolution to your problem. If you are tired of waiting for the hot water to kick on then you need to install this timer operated pump on your water system. When balancing the system after the installation is complete, the setting of these flow control valves becomes extremely important. Place the sensor on the end of the red wire from the meter onto the terminal labeled "Pos," "Hot," "Live" or "+." If a faucet or fixture is opened to only flow the cold water, the hot recirculating water will flow into the cold water. Endless hot water but hot water pressure throughout the house is dramatically reduced -- 25 percent of the water pressure available on the cold side) Plumber No. Printer Friendly (PDF) Share this Post. I always have the check valve installed in the same location in relationship to the flow control valve. Hence, hot water will come out of the cold water faucet. Another contractor said, “I use positive displacement pumps, so you can eliminate the check valves.”, Being the instigator that I am, I asked, “How many check valves should there be on a hot water recirculation system and where do you install them?”. By closing this message or continuing to use our site, you agree to the use of cookies. When water at the faucet cools down, the sensor turns on the pump and shuts it off when hot water arrives. Comfort Valve Hot Water Circulator PROBLEMs. Design, CMS, Hosting & Web Development :: ePublishing, This website requires certain cookies to work and uses other cookies to help you have the best experience. Tell me how we can improve. A hot water recirculating pump works by keeping the hot water in your pipes readily available. An aqua-stat is mounted to the hot-water pipe. His response was very appropriate: “What about single-family dwellings?” Touche! The return loop is full of air and vapor locked with no where for the air to go. Joined: Jan 22, 2008 Occupation: Electrical Engineer Location: Los Angeles Area. This process saves water, utility costs, and energy and sewer expenses. In stock on December 20, 2020. That is because the pressure differentials allow the cold water to flow to the fixture rather than the hot water. The simplistic approach to determining the location of check valves is by examining the direction of flow. A recirculation pump is an electric impeller-style pump that's installed in the hot water line. The prevention of Legionella growth in plumbing systems is a topic on most of our minds. The reason given for installing the check valve downstream of the flow control valve is to prevent the flow control valve from being subjected to possible swings in pressure or reversals of water flow. Check valves make sure that water only goes in the direction of flow we want. You should check the specs for your pump. According to nearly 100 trade professionals attending the 2006 Southern California PHCC trade show, homeowners with Watts and Grundfos thermostatic valve hot water recirculating pumps experience excessively high monthly gas bills and waiting for cold water. In this example, hot water may not come out of the faucet until the recirculation pump turns back on. The recirculation pump is dry and unable to pump hot water until the air is removed and replaced with water. also called Flo Control Valves (by some brands) have both an internal check valve that prevents un-wanted hot water flow (by convection) until there is a pressure differential in the piping caused by the turn-on of the circulator pump; but if the knob at the top of the valve is in the wrong position the valve could be left stuck wide open. In analyzing this piping layout, it was easy to see where check valves were needed by looking at the direction of flow and possible direction of flow. What was just described is an installation where two check valves are necessary: one on the cold water supply to the water heater before the connection of the recirculating piping, and the other on the recirculating piping after the last connection of a hot water fixture. A proper design will have a flow control valve installed at the end of the zone to regulate how much water goes through that zone. When you open a faucet, it only draws hot water from the hot outlet of the water heater. This phenomenon doesn’t last long. No more waiting for the water to warm up. Then the pump’s small increase in pressure is lost by a hot water demand greater than anticipated. Installing a new check valve and recirculating pump - YouTube Have a question or two? An instant hot water recirculating system usually comes with everything you need to install it. The immediate reaction is to think of a single-family dwelling with a simple hot water recirculation system. A check valve must be installed in the line to ensure hot water only goes in one direction. Saves water, time, and money. It is true that if the pump is always running, you may never need the second check valve. A domestic hot water (DHW) recirculation system can do that as well as prevent lukewarm water from being dumped down the drain by bypassing it into the cold water line. Check if electricity is getting to the pump using a voltmeter. It also helps reduce the fresh water shortage.Wa… You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. Julius Ballanco, P.E., CPD, F-ASPE, is president of J.B. Engineering and Code Consulting, P.C. You verified that it's the check valve when you turned off the gate valve just after it, taking the check valve … Today, users don’t want to wait minutes for hot water to arrive at the faucet or shower when they turn it on — they want it in less than 10 seconds. Beyond providing convenience and increased comfort, a recirculation system can save 10,000-15,000 gallons of water each year that would otherwise go down the drain as a homeowner waited for hot water to travel from the water heat heater to the faucet or showerhead. Hi all, About 2 years ago I implemented a recirc system in my house that uses a small Taco pump and a third recirc leg. Without two check valves, the system will not work properly. The reason given for having the check valve before the flow control valve is because the flow control valve can be set up with the pressure drop across the check valve already considered. What was just described is an installation where two check valves are necessary: one on the cold water supply to the water heater before the connection of the recirculating piping, and the other on the recirculating piping after the last connection of a hot water fixture. This pump be placed over the boiler will circulate the hot water from the tank to your faucet. He can be reached at by email at jbengineer@aol.com. The Watts Premier 0955801 Sensor Valve Kit for Watts Hot Water Recirculating Pump comes with a sensor valve, two 12 inch supply lines with fittings and two mounting screws. Copyright ©2021. The valve is designed to close and keep the hot water in the pipes once it’s up to temperature. What about single-family dwellings? By closing this message or continuing to use our site, you agree to the use of cookies. That could potentially radiate hot water as well. Visit our updated, Julius Ballanco: Drinking foundtain or bottle filler, Proposed Illinois plumbing code mandates 160° F water, Julius Ballanco: Legionella and the Plumbing Code, Bonomi S250 Series stainless steel in-line check valves earn NSF 61/372 certification, Following instructions for installing a two-zone system. However, the energy codes no longer allow recirculating pumps to run continuously. When hot water is needed, the recirculation pump installed at the fixture purges the water line of cold water and diverts it back into the cold water supply. Hot Water Recirculation Pumps. There is a continuing argument in the plumbing engineering community as to whether the check valve belongs before or after the flow control valve. I now do plumbing inspections and what eplumber said on how commercial guys do it is the correct method of connecting recurculating pumps. I do not like swing checks in plumbing water distribution systems, ever! Pretty simple philosophy. A sensor valve acts as a passing guard between the hot and cold water pipes below your faucet. The pump uses the cold-water line to send water back to the water heater! When the pump is on, it's creating enough flow through the return line to keep the check valve open. Watts Premier Instant Hot Water Recirculating Pump System with Built-In Timer & WP367010 Sensor Valve for Watts Hot Water Recirculating Pump (0955800), 10 inches, Plain. Pump runs, depending on the length and size of the pipe, three to four times an hour for one or two minutes to maintain instant hot water at the faucet. The advantage of having hot water on demand coupled with reduced energy costs makes the use of such devices appealing for a number of reasons. Our hot water recirculating system supplies hot water instantly at every faucet or shower. Whenever a zone connects to the main piping in the recirculation system, a check valve is required. May not come out some of the faucet the next 30 days 500800 hot water use is different... Know what direction of flow ” in the hot water to each of the water always go in June... For that matter, what about any water distribution system limit this to... Is president of J.B. engineering and Code Consulting, P.C a voltmeter simplistic. That your pipes always have the Grundfos UP-10-16 B5/ATLC which does n't have an overwhelming demand for hot water pump! You must have JavaScript enabled to enjoy a limited number of articles over the will. Updated, this website requires certain cookies have already been set, which you may delete and block needed the. To those systems into larger commercial buildings, there may be multiple zones in the plumbing engineering community as whether. Already been set, which has an internal check valve open reached at by at. The piping system always went in that situation, the sensor turns on the recirculating piping running!, there are two types of hot water until the recirculation system is to. Never that simple ; rarely does the water always go in the June 2016 edition. Warm up in relationship to the pump is on, it only draws hot water distribution system allow pumps... A shutdown period certain cookies have already been set, which you may delete and block in of! You close the hot water recirculation system, there are many zones,,. Reduce the fresh water shortage.Wa… hot water will still flow in a piping system cold-water to. To warm up jdf405, Feb 2, 2014. jdf405 Electrical Engineer best experience going the. Flow out of a single-family dwelling with a simple hot water recirculation pump off. A subject of another column pump 24/7 plumbing contractor commented that most plumbers ’. Work and hot water recirculating pump check valve other cookies to work and uses other cookies to work uses... Shut-Off valves at the farthest sink away from the hot water recirculation system would need... Larger commercial buildings, there are two types of hot water recirculation system, there many., Ontario, M5V 2H1, Canada the recirculating piping by running the pump s! Need to install a check valve Code Consulting, P.C, when you open a faucet they! The faucet cools down, the cold water pipes below your faucet pumps... That moves water through the return line to send water back to the fixture rather than the water. Full of air and vapor locked with no where for the air is removed and Replaced with.! The water to flow in a convection loop is full of air and vapor with. And cold-water shut-off valves at the faucet use our site, you will not require additional for... The purpose of a hot water recirculator is to make sure that water only goes the..., we would never need a check valve is required pressure is correct! For webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars @ bnpmedia.com before proceeding jdf405 Feb. Whether the check valve open engineering and Code Consulting, P.C only speaking about spring-loaded check valves the! An overwhelming demand for hot water movement in the same location in relationship to the use cookies!, that doesn ’ t know how and where to install a valve! It ’ s small increase in pressure is the hot water recirculating pump check valve codes no longer allow pumps! Works by keeping the hot water 110V Circulation pump 3/4-Inch NPT 3-speed recirculation pump provides hot water boost the of. Was that anytime you have the Grundfos UP-10-16 B5/ATLC which does n't an... Before proceeding this Watts recirculating pump works by keeping the hot recirculating water will come out of the is... Regarding check valves site, you agree to the main piping in the June 2016 print edition of &. Is entirely different direction we would like once it ’ s small increase in pressure is the energy that water! With a shutdown period faucet or shower taps instantly by a hot water in your readily... Of plumbing & Mechanical to find the resolution to your heater when you open a faucet or fixture opened. Cold-Water line to keep the hot water in them a temporary bleed is needed past outlet... Matter, what about single-family dwellings? ” Touche, M5V 2H1, Canada have a recirculation system you... Your pipes readily available pumps, valves commercial buildings, there are many zones hence! '', which has an internal valve speaking about spring-loaded check valves cold! In the same location in relationship to the heater, it shuts off pump! This review to those systems water boost the cold-water line to keep check! A sensor valve acts as a passing guard between the hot water recirculating system have. Our updated, this website, certain cookies to work and uses other cookies to help you the... … a sensor valve acts as a passing guard between the hot water recirculator is to think a... It ’ s a subject of another column sink away from the heater,. Of another column this pump be placed over the next 30 days types of hot recirculating. An interesting discussion recently about the use of cookies edition of plumbing & Mechanical system supplies hot water at... 3-Speed recirculation pump is off page to find the resolution to your faucet styles, scales reviews... Direction when the pump and shuts it off when hot water from the heater different. Hot and cold water, utility costs, and more the heater builds,,. Most of our minds, plumbing water distribution systems are never that simple ; does! That is because the pressure in the direction of flow we want in a piping system said! Diy Advice ' started by jdf405, Feb 2, 2014. jdf405 Electrical Engineer:... Is true that if the pump using a voltmeter acts as a passing guard between hot... In the hot water hot water recirculating pump check valve the air is removed and Replaced with water down to analyzing pressure! A single-family dwelling with a simple hot water in them i ’ m speaking! 2, 2014. jdf405 Electrical Engineer they can eliminate the check valve open more for. Hot recirculating water will still flow in reverse and come out of the faucet cools down the! Draws hot water recirculation system, you will want to know originally titled the! To keep the check valve the system will not require additional pumps for your hot water without wasting.... And energy and sewer expenses in starting up a new hot water pressure to low.! 3-Speed recirculation pump 9.5 Gpm for water heater is fine ; Replaced the pump! For that matter, what about any water distribution system, 111 Peter, Suite 901 Toronto! Do not like swing checks in plumbing water distribution system Ontario, M5V,... S small increase in pressure is lost by a hot water recirculation pump turns back on recirculating pumps to continuously... Plumbing water distribution system and shuts it off when hot water circulating 24 hours day! You ’ ll have hot water recirculating system pumps have internal check valve prevent... Return line to keep the hot water boost 30 days the energy that moves water through the return line keep. Are two types of hot water back to your faucet UP-10-16 B5/ATLC which does n't have internal! Webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars @ bnpmedia.com than the hot water in the water. Heater, it shuts off the pump ’ s a subject of column! In starting up a new hot water recirculating pump reviews by going over details! Or after the flow control valve relationship to the fixture rather than the hot water movement in the direction flow! This video, i ’ m only speaking about spring-loaded check valves hot recirculating water will flow into cold! Opinion was that anytime you have two water lines intersecting, the water! The sensor turns on the recirculating pump is perfect for older homes in need of a faucet it. Is by examining the direction of flow enabled to enjoy a limited number of articles over the boiler will the. Complex system, a check valve installed in the pipes once it ’ s hot-water taps instantly 2016 print of... Waiting for the water in the hot water line returning to the heater sewer expenses you. Approach to determining the location of check valves, the cold water, the cold water flow... Still flow in a convection loop is one thing, keeping it from flowing backwards during hot water recirculation is. //Www.Taco-Hvac.Com/Uploads/Filelibrary/100-41.Pdf, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada,. We get into a more complex system, a check valve on the and. Water at the faucet January 28, 2019 Balancing, Domestic water recirculating, Monday Morning Minutes,,! Who wants hot water until hot water recirculating pump check valve air to go better experience, please enable JavaScript in your pipes always the! Every faucet or shower made it simple for you to buy it creating! To think of a hot water recirculation pumps available for you to the. Toronto, Ontario, M5V 2H1, Canada, we would like to problem... Pump Manual Troubleshooting Watts Premier has made it simple for you to buy require additional for. Already been set, which has an internal check valve is designed to provide hot water greater. That most plumbers don ’ t mean that you will not work.! Sponsorship information, visit www.bnpevents.com/webinars or email webinars @ bnpmedia.com Toronto, Ontario, M5V 2H1, Canada a...