Instant Hot Water with this Recirculation Pump with Bypass Valve.
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- čas přidán 30. 12. 2023
- Before we installed this Grundfos Recirculation pump the client was waiting 1 minute and 30 seconds before the water was hot enough to enter her shower. Now with the bypass valve at the nearby sink, drawing hot water to the master bathroom she can enter her shower in less then 10 seconds.
Of course there is always a trade off when installing luxury items. You will use more energy in gas consumption as you are now continually drawing hot water thru your piping system and back to the water heater. I had a bypass system and a tank booster on my home. My energy analysis from my utility company reported that I used 10% more energy then nearby like homes. It equated to around $15 dollars a month. However I shower 2 sometimes 3 times a day as I'm a Plumber and shower the moment I get home.
The other negative to consider is sometimes you will be brushing your teeth with warm water. If you happen to turn on the cold water side of your faucet while the bypass valve is open and drawing hot water to the valve. You will experience the cold water to be Luke warm a few seconds until the bypass valve closes.
Pros. Most obvious pro is the hot water is now available instantly and no more standing outside your shower in your birthday suit waiting for the water to get hot.
Save tons of fresh water as your not sending annually thousands of gallons to the treatment plant or your drainfild. If you pay for your water there will be a money savings of less water used.
leave in the Commets your thoughts or concerns of this type of hot water recirculation system.
Best Video for this job. Thank you! Made this project go super smooth
Awesome!! That's why do these videos.
Thanks for the video. Good job!
Thank you for showing this. I have one of these in my house and I really love it. For some users who may want a little more robust control of it, they can have (an appropriately rated) smart power outlet installed where the pump plugs in.
I have this connected to a Samsung Smartthings outlet and so I can control the outlet from my phone. One downside of these pumps is that you can end up with excessive warm water forced into the cold water lines via the bypass valve under the sink. In my house this usually happens if the cold water isn't used very much. This can affect cold-water mixing in a shower which results in excessively hot shower water. While I don't always mind it, my kids do and so, with the smart outlet, I can turn off the pump on demand. Then I have a routine that checks every 10 minutes whether the pump is on or off. If the pump is off for 20 minutes, the routine will turn it back on.
Yes I agree. The smart plug outlets are getting pretty good. I should offer that as an option for my customers.
I couldn't tell from your very informative video but did you have an installed heat trap at the top of the anode rod before you attached the recirculating pump? I'm going to attach a Watts recirculating pump to my Bradford White's water heater after first replacing the anode rod but I'm not sure if I should install the new heat trap I purchased? The original anode rod had a heat trap so I purchased a new one to install but I'm unsure if I should? Your thoughts please! Thanks!
Do bypass valve go bad. How long do they last?
I was installing this system and installed the bypass valve first before the pump. What I found is I do not require the pump at all to give me hot water available. Seems the valve opens and closes based on heat as advertised but somehow the hot pushes over to the cold without the pump. This is a plus and a minus value for me as I have now increased to frequency of my hot water heater running during the day. My original intention was to have the hot water available at the shower in the mornings via the timer on the pump, now I have it all day and night. Is there something wrong with my system that would cause the hot to push thru the valve without the pump running? Its a closed system (expansion tank), pressure from main is 65psi and rises a few lbs (1-2) during heating. Expansion tank is new and setup to mfg specs. Thanks for your thoughts on this.
Do I need a blader tank, like I see they have on top of the WH?
Rolo great questions. Yes Storage water heaters should have an expansion tank. 50 gallons of water heated an additional 60 to 70 degrees expands by approximately 1 gallon or more. To avoid that expansion adding pressure to the plumbing system the air balloon in the expansion tank absorbs that expanded water.
Longevity of the bypass valve here in the Pacific Northwest where our mountain water is fairly soft, a little heavy in calcium amd the cities chlorinated a little too much. I tell my customers the bypass valve will be the first thing to fail around the 5 year period.
If you're just pushing back the lukewarm water through the cold water system, doesn't this mean you end up with a legionella-hazard in the cold water circuit? The legionella in the (has-been) hot water should be dead if the boiler is set hot enough, but the cold water can have dormant legionella in it that gets active and breeding because of the higher temperature.
It's my uneducated understanding legions bacterial disease is from standing water. Seems to reason that the circulation would actually help with reducing the chance of legions. It's not a huge concern here in Washington for some reason. I always worry about long branch lines that are stagnant. Where are you from and is Legions disease a serious concern where your at?
@@LearnPlumbing I'm from Belgium, I don't think legionella is a huge thing here, but we are required to avoid storing water (circulating or not) between 20C and 55C for that reason. Above 55C the bacteria are killed, below 20C they are dormant, but by mixing you can end up activating the dormant legionella in the cold water.
@Candisa Our codes require us to set the temperature no higher then 120 for Anti Scalding measures. Very little to no restrictions concerning legionella concerns. However when I'm showing clients how to set there temperature I do I form them that some clients prefer to keep there tanks at 140 to avoid bacteria growth in the tank.
Thank you for your comments