Hello,
I moved into a new build in 2021, and the builder equipped us with a Tankless Combi-Boiler. The house is a 3 story row house about 1300 sq ft total. It has 2 showers and 1 powder. The problem I am having is that the hot water pressure is low when both showers are on. Both showers have a handle that is marked 2.5GPM MAX.
1 shower on is acceptable.
2 showers on with the diverter ON to the handhelds, barely useable.
2 showers on, with 1 shower filling the tub, the second shower is unusable.
2 showers and washing machine. Almost no water on the second shower. It's literally dripping.
1 shower filling the tub, kitchen faucet on hot water at max feels is comparable to if was turned on 30% when nothing is on. Cold water is normal
I spoke to the builder and they are saying its not really a problem as the hose bib measures about 45-50PSI, and flows about 7GPM. They said contact the boiler company. Boiler company is telling me 45PSI is too low and it should be closer to 65-75PSI. So now im going back and forth between the builder and the boiler company.
I've removed the mixing valve, and don't really see a change, so I put it back.
Thru research, this boiler is a Radiant a R2K55. It has a 77F rise @ 5GPM. It should be sufficient in theory from the specs?
The house incoming cold water is 1 inch pex from the city, then it goes down to 3/4 through the house and I see T adapters to 1/2 pex to feed the faucet and toilets. I do not have a manifold
One thing that is strikingly odd to me is that a 3/4 cold water line comes just before the boiler, gets converted to 1/2 sweat, comes back out the hot water out as 1/2 sweat, then gets enlarged to 3/4 to the mixing valve, and feeds to rest of the hot water line at 3/4. Then it gets cut down to 1/2 with T adapters to the faucets.
Would this be the primary reason why my hot water is so crap?
I moved into a new build in 2021, and the builder equipped us with a Tankless Combi-Boiler. The house is a 3 story row house about 1300 sq ft total. It has 2 showers and 1 powder. The problem I am having is that the hot water pressure is low when both showers are on. Both showers have a handle that is marked 2.5GPM MAX.
1 shower on is acceptable.
2 showers on with the diverter ON to the handhelds, barely useable.
2 showers on, with 1 shower filling the tub, the second shower is unusable.
2 showers and washing machine. Almost no water on the second shower. It's literally dripping.
1 shower filling the tub, kitchen faucet on hot water at max feels is comparable to if was turned on 30% when nothing is on. Cold water is normal
I spoke to the builder and they are saying its not really a problem as the hose bib measures about 45-50PSI, and flows about 7GPM. They said contact the boiler company. Boiler company is telling me 45PSI is too low and it should be closer to 65-75PSI. So now im going back and forth between the builder and the boiler company.
I've removed the mixing valve, and don't really see a change, so I put it back.
Thru research, this boiler is a Radiant a R2K55. It has a 77F rise @ 5GPM. It should be sufficient in theory from the specs?
The house incoming cold water is 1 inch pex from the city, then it goes down to 3/4 through the house and I see T adapters to 1/2 pex to feed the faucet and toilets. I do not have a manifold
One thing that is strikingly odd to me is that a 3/4 cold water line comes just before the boiler, gets converted to 1/2 sweat, comes back out the hot water out as 1/2 sweat, then gets enlarged to 3/4 to the mixing valve, and feeds to rest of the hot water line at 3/4. Then it gets cut down to 1/2 with T adapters to the faucets.
Would this be the primary reason why my hot water is so crap?