Low cold water pressure some outlets

[DCPAS]

2019 FC 25RB. De-winterizing. I have quite low water pressure at the two sinks and outside shower. Pressure is OK at the inside shower and toilet. Same whether city water or pump. Hot is fine. Any thoughts on what to look for? I am thinking about blowing compressed air through the system.

[starfishscub]

The exact thing happened to my Airstream, the aerators were clogged with the winterizing fluid. As suggest soak in vinegar and the problem solved. The moen aerator sometimes requires a special wrench to remove, I found them at Lowes a set of 4 sizes comes on a key ring for around $10.00.

[DCPAS]

Originally Posted by starfishscub

The exact thing happened to my Airstream, the aerators were clogged with the winterizing fluid. As suggest soak in vinegar and the problem solved. The moen aerator sometimes requires a special wrench to remove, I found them at Lowes a set of 4 sizes comes on a key ring for around $10.00.

Thanks, but it's not the aerators. I checked that and, anyway, the hot side has good pressure through the same faucets.

[GCinSC2]

Might need to pull the cold valve assy and inspect/clean.

[daleyocum]

If you have a hot water tank then you have a mixing valve attached to it. That is notorious for being problematic after dewinterization. It has filter screens as well as internal mechanisms that could fail. Your failure mode is weird though.

[daleyocum]

Another idea. Some trailers have a separate water filter for the cold water of the sinks. You might check under the kitchen and bath sinks and see if that applies to you. If so, there’s the problem!

[DCPAS]

Originally Posted by daleyocum

If you have a hot water tank then you have a mixing valve attached to it. That is notorious for being problematic after dewinterization. It has filter screens as well as internal mechanisms that could fail. Your failure mode is weird though.

Yeah, I think I have that problem too now. The cold water got better after I put compressed air through. Apparently dislodged whatever was there. Thanks.

[daleyocum]

Originally Posted by DCPAS

Yeah, I think I have that problem too now. The cold water got better after I put compressed air through. Apparently dislodged whatever was there. Thanks.

Glad to hear it got better. Be sure to heat up the hot water tank and see if the hot water, and cold water, come out at the temperature and flow you expect. I’ve been through two mixing valves so far, always discovered when dewinterizing.