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01-23-2011, 07:57 AM
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#1
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Rivet Master
1974 31' Excella 500
Charleston
, South Carolina
Join Date: Nov 2010
Posts: 1,073
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Pex for fresh tank outlet
I'm having trouble finding a fitting for the fresh water tank outlet (right side of picture).
I'm going to plumb the trailer with Pex and assume that I need an outlet with a Pex type (ringed) male connection.
All of the Pex connection things that I find like this (1/2) have a much larger side that screws into the tank. The 1/2 and 3/8 fresh water tank outlets both have the same size end that screws into the tank.
It looks like the screw in end is 3/8 and the outlet side is 1/2 for the fresh water outlet thing.
This needs to be a 1/2" Pex outlet but I can't find one with a 3/8" end that screws into the tank.
Help!?
__________________
As I grow older, I pay less attention to what men say. I just watch what they do.
- Andrew Carnegie
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01-23-2011, 08:41 AM
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#2
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2 Rivet Member
1997 34' Limited
1963 22' Safari
Troy
, Michigan
Join Date: Apr 2002
Posts: 97
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Get a adapter or reducer that goes from 3/8 to 1/2. Ace hardware, lowes, home depot. I have not found a 1/2 pex with a 3/8 M or F thread.
F
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Paul
Troy, MI
1963 22'Safari
1997 34' Classic FK
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01-23-2011, 08:44 AM
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#3
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2 Rivet Member
1964 19' Globetrotter
1961 22' Spaceliner
Springville
, Utah
Join Date: Jul 2003
Posts: 70
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Hello DanielB
The fittings that you are showing in the picture appear to be barbed fittings. Barbed fittings are intended to be used with hose or a softer flexible pipe, not with pex. The pex that I used in my AS was only available in 3/8" or 1/2". If I am understanding your problem correctly, you need to start with a 3/8" plastic nipple(double male) in the outlet of the tank, then you will be able to use available pex fittings that thread onto that nipple.
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Globestream
1964 Globetrotter
1961 Spaceliner
Utah
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01-23-2011, 08:44 AM
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#4
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Rivet Master
1963 19' Globetrotter
Currently Looking...
Orion
, Illinois
Join Date: Aug 2004
Posts: 714
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I'd use a 3/8 PVC fitting out of the tank with a short piece of 3/8 PVC ,then connect to the PEX with a Sharkbite type connection. All kinds of ways to do this other than crimp connections that will work very well and are available at any good hardware place. Happy plumbing.
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01-23-2011, 09:17 AM
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#5
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Rivet Master
1966 24' Tradewind
1995 34' Excella
Lynchburg
, Virginia
Join Date: Jun 2006
Posts: 4,226
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You can use barb fittings with hose clamps on the inlet (low pressure) side of the pump. On the outlet side of the pump then use the 1/2" pex with the copper crimp rings.
Dan
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01-23-2011, 11:12 AM
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#6
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Rivet Master
1974 31' Excella 500
Charleston
, South Carolina
Join Date: Nov 2010
Posts: 1,073
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I went to Lowes and was able to find a reducer.
The leftmost piece is a 1/2 Pex fitting.
The center piece is a non-pex 1/2 to 3/8 reducer.
The rightmost piece is the water tank outlet valve.
I was so excited I neglected to get the one last necessary piece.. a 3/8 sleeve.. one end to screw in where the outlet valve is screwed in in the picture and the other end to screw into the tank.
Stuff like this just drives me nuts.
__________________
As I grow older, I pay less attention to what men say. I just watch what they do.
- Andrew Carnegie
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01-23-2011, 12:04 PM
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#7
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Rivet Master
1968 24' Tradewind
Oxford,
, Mississippi
Join Date: May 2009
Posts: 1,564
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I installed a new fresh tank last summer. I used a brass 3/8 to 1/2 adaptor into the tank and a pex/1/2 into the brass. The barb fitting in the pic is not for pex. If you are going to use flex tubing from the barbed fitting to your water pump then it would work fine, but pex may leak if you use the barb fitting.
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Bruce & Rachel
__________________
68 Trade Wind
2001 Toyota Tundra
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01-23-2011, 01:10 PM
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#8
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Rivet Master
1974 31' Excella 500
Charleston
, South Carolina
Join Date: Nov 2010
Posts: 1,073
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The barb fitting is going away. It is just there to verify the 3/8. Where the barb fitting is is where the assembly will screw into the water tank.
__________________
As I grow older, I pay less attention to what men say. I just watch what they do.
- Andrew Carnegie
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01-23-2011, 02:30 PM
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#9
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x
XXXX
, XXXX
Join Date: Jun 2010
Posts: 2,601
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Water Tank Access
Daniel here are a couple of pics of the access hole in my floor for the fresh water tank.
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01-23-2011, 03:13 PM
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#10
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Rivet Master
1974 31' Excella 500
Charleston
, South Carolina
Join Date: Nov 2010
Posts: 1,073
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Thanks Chris. Is the outlet pipe from the tank going to come up through the floor through this opening?
__________________
As I grow older, I pay less attention to what men say. I just watch what they do.
- Andrew Carnegie
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01-23-2011, 03:54 PM
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#11
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x
XXXX
, XXXX
Join Date: Jun 2010
Posts: 2,601
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Daniel yes all the plumbing will enter the trailer from this point. The fill hose from the fresh water fill port comes down through here as does the two air vent lines to the fill port. That is what the two elbows you can see in the pics are for. The supply line from the fresh tank to the water pump and the supply line from the city water also comes up through here.
You can see two holes in the plywood below the tank, they are for the tank drain and low point system drain lines. I used the original plywood and haven't drilled through the new belly pan material yet.
BTW FYI I am redsigning my city water supply lines and will not be using the same path. The original travels forward roadside and then under the floor and across to curbside at the fresh tank. I am going to go around the rear of the trailer under the beds and nighttable and travel forward curbside and eliminate the under the floor section completely. It was always a problem point for me while full timing in the winter. The line always froze there due to the proximity to the belly vent for the fridge.
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01-23-2011, 04:08 PM
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#12
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Rivet Master
1974 31' Excella 500
Charleston
, South Carolina
Join Date: Nov 2010
Posts: 1,073
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Interesting idea about rerouting.
I thought the air vents were overflow vents too. I thought that they would just have hoses on them that would run directly down to the outside.
__________________
As I grow older, I pay less attention to what men say. I just watch what they do.
- Andrew Carnegie
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01-23-2011, 04:10 PM
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#13
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x
XXXX
, XXXX
Join Date: Jun 2010
Posts: 2,601
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Quote:
Originally Posted by DanielB
Interesting idea about rerouting.
I thought the air vents were overflow vents too. I thought that they would just have hoses on them that would run directly down to the outside.
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If you look at the fill port there is a small 1/4" connection point for the overfill/ air vent line. While I'm getting a pic of the reel area I'll get a pic of lines for this.
BRB in 5 mins.
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