Tom Wurtenberger
New Member
I hope someone can help me figure this out. I've been noticing that the hot water temperature has been getting cooler and cooler at the kitchen faucet. So I have read a couple of posts on here and done the testing they suggested. Let me describe my system first.
It's a older house with galvanized pipes that I'm sure have lost flow rates. 50 PSI 5.27 GPM measured at hose bib. There is a whole house tankless water heater Bosch Aquastar 125 that is de-scaled annually. Pfister single lever faucet at tub/shower. Delta Touch 20 single handle kitchen faucet. Unknown possible Moen double handle lavatory faucet.
Here are the temps that I recorded.
Bath 120*
Kitchen 108*
Lavatory 108*
I shut off the cold water supply at Kitchen and Lav. (no shut off at tub/shower) and saw no change in temps. but if I turn Tub/shower to full hot the Lav and Kitchen temps will also rise to tub/shower temp. I then changed the tub/shower cartridge and saw a slight increase in temps across the board.
Bath 126*
Kitchen 113*
Lavatory 118*
As a side note flow rate at Bath/shower is off 3.44 GPM cold 2.05 GMP hot and this did not improve after cartridge change.
So I'm asking what else I should be trying?
It's a older house with galvanized pipes that I'm sure have lost flow rates. 50 PSI 5.27 GPM measured at hose bib. There is a whole house tankless water heater Bosch Aquastar 125 that is de-scaled annually. Pfister single lever faucet at tub/shower. Delta Touch 20 single handle kitchen faucet. Unknown possible Moen double handle lavatory faucet.
Here are the temps that I recorded.
Bath 120*
Kitchen 108*
Lavatory 108*
I shut off the cold water supply at Kitchen and Lav. (no shut off at tub/shower) and saw no change in temps. but if I turn Tub/shower to full hot the Lav and Kitchen temps will also rise to tub/shower temp. I then changed the tub/shower cartridge and saw a slight increase in temps across the board.
Bath 126*
Kitchen 113*
Lavatory 118*
As a side note flow rate at Bath/shower is off 3.44 GPM cold 2.05 GMP hot and this did not improve after cartridge change.
So I'm asking what else I should be trying?