Quote:
Originally Posted by Topspinmo
Ok, valves are fully open.
The new delta flow is 2 cups to 2.2 cups in 10 seconds. The old deltas in back measure 4.4 to 4.6 cups in 10 seconds. So stands to reason it will take twice as long to get hot water due to reduced flow. Unless I find easy way to open up flow I’ll just live with it no sense fixing something that’s not broke… I’ve looks at other brands most flow 1.2 to 1.5 GPM. One brand flowed 2.2 GPM some didn’t’ list flow spec’s.
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2 cups in 10 seconds = 12 cups in 60 seconds = 0.75gpm
4.4 cups in 10 seconds = 26.4 cups in 60 seconds = 1.65gpm
From your numbers it would appear that either
- you have very low water pressure causing a 2gpm to only give 1.5gpm and a 1.2gpm to only give 0.75gpm
OR
- your old fixture is a 1.5gpm and something is wrong with the new parts used for your new fixture (blocked valve, blocked line, bad/blocked faucet)
What I would try in my home:
- Do I get the same flow for both straight hot water and straight cold water? They go through different valves and different lines so the same flow would point to the faucet as a problem.
- What flow do I get if I close the valve, remove the line from the faucet, put it into a bucket, then turn the valve back on? Then try the same thing at one of the faucets that seem to work correctly. If the flow is the same then the faucet is different and might be bad. If the flow is different, likely lower at the slow faucet, then maybe something in the valve or line to the faucet is bad.