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Old 07-17-2015, 09:43 AM   #1
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Low flow

Has anyone upgraded their water pump? My flow is really slow with the Surflo pump that came with my TT
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Old 07-17-2015, 09:59 AM   #2
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I had a low flow problem with my MH and found kinked tubing under the bed. Original installation included too much tubing. Check around your water pump for any kinks in the visible tubing.
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Old 07-17-2015, 10:09 AM   #3
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The flow from these pumps is very adequate.


Look for:
- Low battery
- Poor electrical connections
- Continuity through the switches
- Clogged aerators
- Clogged filter (intake side of the pump)
- Kinked hoses
- Open antifreeze intake
- Closed valve to the FW tank (used with the antifreeze valve)
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Old 07-17-2015, 10:20 AM   #4
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Battery is good. 13v. I'll check the hoses
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Old 07-17-2015, 12:06 PM   #5
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Originally Posted by tawoo View Post
Battery is good. 13v. I'll check the hoses
Put the DVM on the leads to the motor when it is running to see if you have wiring/switch issues.

The good money on the intake screen. Followed by a kinked hose in a nearly inaccessible location that requires 2 flashlights, an inspection mirror, 3.5 assistants and a pitcherfull of blind luck to find.
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Old 07-17-2015, 12:46 PM   #6
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Looking for the kink. Sure wish I had the 3.5 assistants.
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Old 07-17-2015, 12:56 PM   #7
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A while back the pump would cycle with nothing on and no leaks. I messed with the little Allen screw. The cycling stopped but I'm not sure if that caused low flow. Any ideas?
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Old 07-17-2015, 01:50 PM   #8
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[QUOTE=tawoo;322776 ....I messed with the little Allen screw....[/QUOTE]

<<cringe>>

I haven't had the new design pumps apart yet. But I read the manual. There are 2 settings. 1 is the pressure cycling switch and the other controls the bypass preload.

According to the documentation, "Don't mess with them unless you know what you are doing."

When you set the bypass preload too low, the pump won't shut off
You may have the preload too high and the pump is working too hard?

You may have set the pressure switch too low and the pump isn't developing enough pressure to give good flow.

But, since the problem seems to have happened well after you abused your poor, defenseless pump, I'm still pressing for disassemble the intake filter and clean it in the house.
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Old 07-17-2015, 01:56 PM   #9
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What a relief, I thought this thread was about something else!
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Old 07-17-2015, 02:58 PM   #10
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What a relief, I thought this thread was about something else!
It is. Next we are going to prescribe tamsulosin. We'll see if that has the desired effect.
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