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Anti Scald Mixing Valve

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  • Oct 21st, 2020 9:46 pm
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[OP]
Sr. Member
Sep 14, 2007
880 posts
284 upvotes

Anti Scald Mixing Valve

I had the water heater rental company bring an inspector in as every year when the temperature dips, I notice occasional drop in hot water temperatures.
Just now I checked it was 110F which is a good temperature, but other times it's lower than that. They demonstrated that the hot water coming from the heater was fine (pipe was hot to touch), but that the pipe that distributes to the rest of the house was much cooler. They said it was a problem with the mixing valve and required a replacement which wasn't covered. So my options are look for a plumber, or try to fix this myself. I've watched a few videos on youtube and this repair doesn't look too bad. In some cases, maybe just washing the inside, getting rid of scaling by soaking in vinegar for a while might even fix the issue. If not though, I would need to buy this valve, and this is such an obscure product there aren't many reviews for me to have an informed opinion. Here's where I'm looking for the community of DIYERs here to please recommend me which valve (brand name/model/features to look for/warranty) to choose. Also please stop me if you think this repair is too risky and I could mess something up real bad to try and save maybe $3-400.

Thanks
47 replies
Deal Expert
Aug 22, 2011
34491 posts
20530 upvotes
Center of Universe
stryder1587 wrote: I had the water heater rental company bring an inspector in as every year when the temperature dips, I notice occasional drop in hot water temperatures.
Just now I checked it was 110F which is a good temperature, but other times it's lower than that. They demonstrated that the hot water coming from the heater was fine (pipe was hot to touch), but that the pipe that distributes to the rest of the house was much cooler. They said it was a problem with the mixing valve and required a replacement which wasn't covered. So my options are look for a plumber, or try to fix this myself. I've watched a few videos on youtube and this repair doesn't look too bad. In some cases, maybe just washing the inside, getting rid of scaling by soaking in vinegar for a while might even fix the issue. If not though, I would need to buy this valve, and this is such an obscure product there aren't many reviews for me to have an informed opinion. Here's where I'm looking for the community of DIYERs here to please recommend me which valve (brand name/model/features to look for/warranty) to choose. Also please stop me if you think this repair is too risky and I could mess something up real bad to try and save maybe $3-400.

Thanks
My advice...bypass the mixing valve altogether.
Deal Addict
Jun 16, 2009
2302 posts
800 upvotes
Woodbridge
Replacement should not cost of over 250 $ including labour. I am also of the opinion as @vkizzle to bypass it or remove it completely if you do not have too young or too old folks at home.
stryder1587 wrote: I had the water heater rental company bring an inspector in as every year when the temperature dips, I notice occasional drop in hot water temperatures.
Just now I checked it was 110F which is a good temperature, but other times it's lower than that. They demonstrated that the hot water coming from the heater was fine (pipe was hot to touch), but that the pipe that distributes to the rest of the house was much cooler. They said it was a problem with the mixing valve and required a replacement which wasn't covered. So my options are look for a plumber, or try to fix this myself. I've watched a few videos on youtube and this repair doesn't look too bad. In some cases, maybe just washing the inside, getting rid of scaling by soaking in vinegar for a while might even fix the issue. If not though, I would need to buy this valve, and this is such an obscure product there aren't many reviews for me to have an informed opinion. Here's where I'm looking for the community of DIYERs here to please recommend me which valve (brand name/model/features to look for/warranty) to choose. Also please stop me if you think this repair is too risky and I could mess something up real bad to try and save maybe $3-400.

Thanks
HVAC Professional. Committed to customer, not brand.
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Member
Jun 4, 2020
206 posts
161 upvotes
Clarington, ON
vkizzle wrote: My advice...bypass the mixing valve altogether.
I third the opinion of vkizzle and newlyborn
[OP]
Sr. Member
Sep 14, 2007
880 posts
284 upvotes
I dont have kids or old folks at home. How do I bypass it? I'm guessing there's a T shaped fitting that connects hot/cold/mix but doesn't have an anti scald function? I don't have any tools to cut pipes or anything like that, if this is an easy bypass, please guide me to a tutorial for this.
Deal Addict
Jun 16, 2009
2302 posts
800 upvotes
Woodbridge
You should know basic plumbing. If its a copper line than brazing and if its pex lines than you should be well versed with crimping. Do you have all the necessary tools?
You will need to cap the cold line feeding into mixing valve and connect hot line coming off from the water heater directly to the line connected to mixing valve. Try youtube for videos.
stryder1587 wrote: I dont have kids or old folks at home. How do I bypass it? I'm guessing there's a T shaped fitting that connects hot/cold/mix but doesn't have an anti scald function? I don't have any tools to cut pipes or anything like that, if this is an easy bypass, please guide me to a tutorial for this.
HVAC Professional. Committed to customer, not brand.
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Deal Addict
Feb 11, 2018
1363 posts
1124 upvotes
stryder1587 wrote: I dont have kids or old folks at home. How do I bypass it? I'm guessing there's a T shaped fitting that connects hot/cold/mix but doesn't have an anti scald function? I don't have any tools to cut pipes or anything like that, if this is an easy bypass, please guide me to a tutorial for this.
This should give you a few ideas.... Btw I removed mine a long time ago (copper pipes).
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Deal Fanatic
Dec 5, 2009
5597 posts
3353 upvotes
I removed mine. As long as you don’t have young children it should be fine.
Deal Addict
User avatar
Jul 25, 2008
1101 posts
491 upvotes
GTA
Had the same problem when I moved in. The plumber just told me to remove it. I have young kids but its never been a problem. Teach them not to touch the faucet or how to turn the faucet. They’ll pull back if the water is too hot anyway.
Deal Addict
Sep 13, 2016
2436 posts
1270 upvotes
Mississauga
Yeah..remove it altogether. The potential danger to kids and old are overblown. If kids are old enough where they turn on their own showers, they will know if the water is too hot to their liking. The fear of fire and burn is built into our genes. My 2 year old already knows and reacts to anything hot.
Deal Addict
Feb 10, 2006
2253 posts
275 upvotes
Kitchener
Hopefully you are renting the tank from enercare or another provider other than reliance. Call reliance home comfort and sign up for a plumbing protection plan. They are approximately $20 a month. Wait 7 days and then say you need a plumber. They will replace the mixing valve as it is covered under the plan. Reliance does not have any contracts so after they change the mixing valve call back and cancel the plan.

$20 to have then install a new mixing valve, keeps you to code and saves you time and possibly frustration. Remember to cancel the plan!
Deal Addict
Feb 10, 2006
2253 posts
275 upvotes
Kitchener
IndyBeak wrote: Yeah..remove it altogether. The potential danger to kids and old are overblown. If kids are old enough where they turn on their own showers, they will know if the water is too hot to their liking. The fear of fire and burn is built into our genes. My 2 year old already knows and reacts to anything hot.
Accidents happen. I was at an elderly customers house a few years ago. His friend was paralysed in some way. Apparently the elderly man scalded himself to death. I'm sure they didn't alter the code because they wanted people to blow 400 on nothing.
Member
Jul 14, 2012
320 posts
134 upvotes
Hamilton
Double_J wrote: Hopefully you are renting the tank from enercare or another provider other than reliance. Call reliance home comfort and sign up for a plumbing protection plan. They are approximately $20 a month. Wait 21 days and then say you need a plumber. They will replace the mixing valve as it is covered under the plan. Reliance does not have any contracts so after they change the mixing valve call back and cancel the plan.

$20 to have then install a new mixing valve, keeps you to code and saves you time and possibly frustration. Remember to cancel the plan!
"...I started playing porn REALLY loud with speakers facing my back yard. The kids stopped going out back after the parents heard that." - TheGreatGazoo
Deal Addict
Feb 10, 2006
2253 posts
275 upvotes
Kitchener
I thought 21 days was for heating and cooling plans only. Meh I might be wrong its been almost 2 yrs since I worked there.
Deal Addict
Sep 13, 2016
2436 posts
1270 upvotes
Mississauga
Double_J wrote: Accidents happen. I was at an elderly customers house a few years ago. His friend was paralysed in some way. Apparently the elderly man scalded himself to death. I'm sure they didn't alter the code because they wanted people to blow 400 on nothing.
Yes, accidents happen. But your anecdote, what is the probability of something like that happening. Set the code aside, don't you think it should be the other way around. The approach should be to have a mixing valve by default, and let people add it if they think someone in their home is at risk. Another example, infants can hurt themselves badly if they accidentally roll over the stairs. So do we make it mandatory for all homes to have baby proofing? Or just the parents who have infants in their homes baby proof thing based on their own requirements.

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