Obsoperator
New Member
I live in a large 1955 ranch house with a 50' insulated 1/2" copper horizontal run from the water heater to the kitchen. The 3/4" copper cold water runs 50' from the service valve to the water heater. When I run a lawn sprinkler from a hose, it seems like even a recently used hot water faucet nearer the heater runs cold even longer than it might "first thing in the morning".
The newer Kenmore gas hot water heater seems to have silver check valve nipples. There is a fancy Watts MMV tempering valve (which nominally has check valves) in the greenhouse room. The single-lever faucets in the bathrooms have new cartridges-because the city water is very hard, they were limed-up. The kitchen has a cheaper Delta single-lever with a nylon ball.
Am I right in imagining that the high cold water flow is pulling hot water out of the hot lines? Is it safe to put a flapper check valve into the 3/4" cold feed before the water heater? Thanks.
The newer Kenmore gas hot water heater seems to have silver check valve nipples. There is a fancy Watts MMV tempering valve (which nominally has check valves) in the greenhouse room. The single-lever faucets in the bathrooms have new cartridges-because the city water is very hard, they were limed-up. The kitchen has a cheaper Delta single-lever with a nylon ball.
Am I right in imagining that the high cold water flow is pulling hot water out of the hot lines? Is it safe to put a flapper check valve into the 3/4" cold feed before the water heater? Thanks.