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Old 10-17-2014, 12:01 PM   #1
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Low or Slow Water Pressure

We have a 2002 Monaco Signature Supreme. In fantastic condition. However, we are experiencing low water or slow pressure. I have changed the water filters, cleaned the faucet valves, just replaced the water diverter valve. The water pressure at the sink starts out great, then slows down. At my wits end. Any suggestions please.
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Old 10-17-2014, 12:04 PM   #2
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Are you on city water or using the water pump when this happens?
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Old 10-17-2014, 12:06 PM   #3
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We have a 2002 Monaco Signature Supreme. In fantastic condition. However, we are experiencing low water or slow pressure. I have changed the water filters, cleaned the faucet valves, just replaced the water diverter valve. The water pressure at the sink starts out great, then slows down. At my wits end. Any suggestions please.
Try looking for a pinched or somehow restricted water line where they travel through the slide.
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Old 10-17-2014, 12:08 PM   #4
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Is it just at the sink?
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Old 10-17-2014, 12:26 PM   #5
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We have a 2002 Monaco Signature Supreme 43 ft. It is in like new condition, however we are experiencing low water pressure (slow) at all the faucets, even the shower. I have replaced the filters, cleaned the aerators, installed a new swan diviter valve for city and fresh water control. If I turn on the water pump at the same time as running city water it does get better. The water pump runs very good pressure. It is just the city side where the problem seems to exist. Any suggestions where to look?

We full time in an 3 Sig & have lived in it for 7 years now.

The most likely place is a check valve that's in the line close to the incoming water hookup. If you have a hose reel there will be a plastic check valve on the house side of the reel. It's cheap and often obstructs flow. I replaced mine with a Shark Bite type push on fitting. If you are using some type of pressure reducing valve, the Camco types are very restrictive and reduce volume too much. If you need a pressure reducer, get a whole house type (Watts) at Lowes or HD and plumb it up to work at the hose connection.


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Old 10-17-2014, 01:03 PM   #6
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If it starts out good and slows, the problem is a constriction in a line or a clogged filter. You have pressure, but not enough volume is getting through.

You said you cleaned the faucet valves, but what about the debris screens on the faucet spout? They are a common source of low flow problems.
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Old 10-17-2014, 01:39 PM   #7
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Have you replaced the water pressure valve? I get them at Walmart for about $10. They usually need replacement once a year or so. You can spend more money and get a better one also. I've seen them for $50-$150. I'm sure they will last longer.
The problem you describe is what let's me know its time to change the pressure valve.
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Old 10-17-2014, 01:40 PM   #8
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To take the guess work out of situations like this, it's best to have a gauged and adjustable water pressure regulator attached to the park's faucet. With this you can tell what pressure the park's water system is operating at. If sufficient pressure there, you can move the gauge to the other end of your hose (just before it attaches to your mh) to see if the hose is culprit.

However, from your description, it sounds like the park's pressure is down.

Recently we stayed at a park where my gauge indicated that the park's pressure was only about 20 lbs. I too had to run my mh's water pump to get sufficient pressure to shower.

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Old 10-17-2014, 02:17 PM   #9
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Start eliminating possible fail points. Hook the hose directly to the faucet after making sure any washer screens are clear. Then make sure screen at coach connection is clean and then attach hose. No inline filters, no inline pressure regulators, no inline diverters, nothing. Turn on water and check pressure at several faucets (hot and cold), toilet, etc. If good, then internal plumbing should be good. Then start back adding (one at a time) filters, regulators, etc.
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Old 10-18-2014, 11:30 AM   #10
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City Water
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Old 10-18-2014, 11:32 AM   #11
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Is it just at the sink?
Shower also
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Old 10-18-2014, 11:34 AM   #12
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No hose reels, but I just replaced the Swan diverter valve which includes the check valve, and still have the same result, except now the check valve is working and preventing leakage to the fresh water tank. I will check for a pinched line somewhere. Many thanks.
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Old 10-18-2014, 11:37 AM   #13
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Which pressure valve are you referring to. Replaced the by diverter valve, new pressure regulator. Is the another valve? Thank you
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Old 10-18-2014, 11:39 AM   #14
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It is when I am on city water. I have a gauged pressued valve and it shows 55 pounds. Thanks for reply.
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