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Old 06-04-2014, 11:26 AM   #1
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1965 17' Caravel
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Pump silencing kit needed?

I just installed a new Shurflo Revolution pump in my 65. I'm still finishing the plumbing, all new PEX... but rather than purchasing the silencing kit, I just bought Home Depot standard sink flexible lines. Has anybody used these for this purpose? I am looking at the inside of the couplings for these lines and they are quite a bit smaller than 1/2" ID. Does anybody that has the silencing kit know if the ID is 1/2"? I don't want to cause any problems with my new pump, but I don't know if there is any real difference with the silencing kit and the HD sink hose. Any thoughts?
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Old 06-04-2014, 11:30 AM   #2
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Pretty sure the silencer kit is 1/2". I think any smaller than that and your pump cannot deliver full flow.
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Old 06-04-2014, 01:06 PM   #3
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Yeah, thats what I am worried about. I might need to go to the local RV dealer and see if they have a kit I can look at and buy. I think I'll use the sink connectors on the kitchen sink instead. Thanks for the input!
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Old 06-05-2014, 12:07 AM   #4
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I'm not exactly sure if I will answer your question or not. I've got the Shurflo Pump Silencing Kit 94-591-01 here in front of me. It consists of two 36" hoses and two 1/2" NPT-M bushings. The ID of the hoses is significantly restricted at each end by what appears to be rubber washers that I'm guessing help seal the hoses to the bushings.
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Old 06-05-2014, 12:30 AM   #5
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Pump silencing kit needed?

I can't remember just what pump I bought last year but I do remember I used the same style sink connections as you.

My pump seems to move plenty of water.

The size of the tubing is important , but short lengths of smaller hose matter a lot less than they would if they were long.
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Old 06-05-2014, 07:08 AM   #6
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Quote:
Originally Posted by J. Morgan View Post
I can't remember just what pump I bought last year but I do remember I used the same style sink connections as you.

My pump seems to move plenty of water.

The size of the tubing is important , but short lengths of smaller hose matter a lot less than they would if they were long.
This is true, but any restrictions or fittings (90's, 45's, Tees, and couplings) have a smaller inside diameter than the pipe they are being used with, causing a loss of volume and pressure at the outlet end.
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Old 06-05-2014, 07:28 AM   #7
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Thanks for the replies. I moved the sink connectors last night to the new kitchen faucet. I am going to get the kit and be done with it. I will look at it when I get it an report back here my findings. The sink connectors were restricted at the bushing, not just the washer.
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Old 06-05-2014, 08:48 AM   #8
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I guess my point was rooted in practicality. The setup moves plenty enough water to take a nice shower.
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