First some background;
- our house was built in '56 and has galvanized pipe
- Hot water heater is almost two years old
- We finished remodeling our kitchen last July and installed a new sink and faucet (Grohe 32665DC1 SuperSteel Concetto Single Handle)
- The lines running to the kitchen are linked to the faucet and the dishwasher.
The water pressure for the kitchen sink was always fine. It's no firehouse but it doesn't need to be. However, in the last couple of months it has decrease to just above a trickle. I've opened up every possible inlet/outlet on the faucet to clear rust and it appears to be fine. I disconnected the flexible supply lines and ran water through those. There doesn't seem to be any obstruction but the pressure there is still lacking, although seemingly not as bad as at the faucet.
I don't know where else to look for an obstruction. The faucet itself was/is low-flow but this is ridiculous. The water pressure everywhere else in the house is fine so it has to be isolated to the lines running to the kitchen. I've experienced an episode where I was running the dishwasher and the sink at the same time and caused some 'jackhammering' in the lines. Shutting off the sink stopped the "hammering".
I intend on having the galvanized replaced with PEX at some point but it isn't in the budget right now. I'm hoping there is a way to clear the lines for the time being.
I am not experienced with plumbing. I've read quite a bit on the web but I don't like working with the galvanized for fear I'm going to make something worse.
I'm very close to calling a plumber but I want my ducks in a row if I come to that point so I'm not taken for a ride.
Any thoughts from the hive mind? Craig