Low Water Pressuer At Galley Sink

[bchristie]

2014 Cutwater 28: I have good water pressure in the head and cockpit sinks but very low pressure in the galley. I have removed the pull-out spray wand and the pressure at the end of the supply hose is very weak. So, not the wand as one would suspect. Any ideas why I would have good pressure throughout the system except at the galley outlet?

 

[4umfreak]

There's a kink in the line somewhere, remove the kink and it should be fixed. Finding & reaching the kink may be difficult, but I'd start looking where it comes throught the wall under the sink.

 

[glider4]

Low pressure both hot and cold?

 

[Osprey]

Check the filter which is located where the flex hose connects to the "fixed" boat supply line. That is, at the input to the flex hose.

 

[Cutwater28GG]

Check the filter which is located where the flex hose connects to the "fixed" boat supply line. That is, at the input to the flex hose.

This ^

There are two places that stop flow. The mesh filter at the base of the handle
The plastic filter as described above. I had a tiny plastic particle that was stopping the filter from flowing properly.

 

[bchristie]

Thank you for your responses. Just to confirm, there is a filter located under the galley sink where the flex line meets the rigid supply line? I will look for that. This would make sense as pressure at the other fixtures is good and the low pressure at the galley faucet, both hot and cold, is very low.

 

[Cutwater28GG]

yes its white. its surprisingly small

 

[Osprey]

To be more precise, the component at the input end of the flex hose is a small anti-backflow valve. To find it you have to disconnect the flex hose from the tap. On the underside of the tap there are 3 connections: cold input, hot input and an output connection to the flex hose. A small open-ended wrench is needed to remove the flex hose. It was an awkward job on my 2012 R27. The only reason the valve was originally put in place is prevent the very unlikely occurrence of water in the sink being drawn back into the supply. That would require some sort of siphon condition. Let’s see, the spray handle submerged in sink water, the tap open, the water pump turned off (no pressure) and water drainage from a supply connection lower than the spray head. A known, and experience action, is for the valve to act as a crude filter. When I did the repair, about 10 years ago, I removed but did not replace the valve.

 

[bchristie]

Great information, thank you all!

 

[4umfreak]

Here's the anti-siphon valve from the base of the flexible hose where it connects with a brass fitting under the galley faucet. To reach the valve, remove the phillips head screw and the brass fitting should come free from behind the sink. Remove the brass fitting from the flex hose to access the valve. Once the hose was removed from the fitting, I was able to remove the valve with a small bolt as a punch.

Once the filter and the corresponding rubber washer is out, scrape the ends clean, run some water over it to remove the loose particles. Blow through it in each direction just to confirm that it is no longer clogged, then toss it to the bottom of the nearest garbage can.

Reassemble the hose without the valve and washer, using a bit of teflon tape to ensure a proper seal and replace the screw. Remove the sprayer handle and turn on the water to blow out any crud that has accumulated in the line behind that pesky valve.

Please excuse the dirty fingers, getting that tap out and back in was a journey.

 

[bchristie]

Thanks for this detailed and helpful information. I was able to disassemble the water supply line fittings. Cleaned and reassembled. Water pressure is now good. Thanks to all for comments and help!