Reply
 
Thread Tools Search this Thread Display Modes
 
Old 01-01-2012, 10:46 PM   #1
Rivet Master
 
Globie64's Avatar
 
1964 19' Globetrotter
The Sea Ranch , California
Join Date: Dec 2004
Posts: 1,377
Images: 18
Blog Entries: 3
New pump VS. Fix the old one

Hi- we are on to the next step in our Airstream adventure, which is to get the pump and tank water system going. I put in a new fresh water tank and replumbed to it, from it and in between. We have the old type on demand pump, with the motor and a fan belt, and two little pistons that go up and down. It's pretty cheap to get a new pump, but this one goes on and off and seems like it might work, it just doesn't pump. Is there an easy fix (O rings or something) or is it just better to get a new one?

Peter
__________________

__________________
Wherever you go, there you are
Globie64 is offline   Reply With Quote
Old 01-02-2012, 01:05 AM   #2
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
The PAR series pumps are still made by ITT Jabsco and service kits including belt, valves, and diaphragm are available for around $100 from marine dealers. I believe most older Airstreams used a PAR 36800 pump but you would want to check and be sure before ordering parts. A google search on "PAR service kit 36800" turns up many online suppliers. You can also get them through Airstream dealers.

The PAR pumps are noisy compared to newer designs but many people believe they are more reliable. My trailer is newer and doesn't have one.
__________________

__________________
Jammer is offline   Reply With Quote
Old 01-02-2012, 01:28 AM   #3
RGates
 
Randy Gates's Avatar
 
1968 20' Globetrotter
Thousand Oaks , California
Join Date: Apr 2010
Posts: 124
If you just replaced your tank then I would replace it with a modern and quiet water pump. They cost about 90.00. I would feel alot more confident with a new pump to fully pressurize the new tank. Then just check the rest of your systems for leaks or needed repairs. It all depends on what your comfort level is. Happy motoring!
Randy
__________________
Randy Gates is offline   Reply With Quote
Old 01-02-2012, 03:05 AM   #4
Rivet Master
 
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
Join Date: Jul 2005
Posts: 2,941
The PAR pump does not pressurize the tank. The old air pumps did. You had to use a metal tank to make them work properly. The Par pump is OK but I chose to replace it with one of the rotary ones when my PAR quit.
__________________
dwightdi is offline   Reply With Quote
Old 01-02-2012, 03:52 AM   #5
Rivet Master
 
RickDavis's Avatar

 
1961 24' Tradewind
1969 29' Ambassador
1970 21' Globetrotter
Jamestown , Tennessee
Join Date: Jul 2008
Posts: 1,781
The shurflo 2088 series pumps are reasonably priced and quite reliable. They are probably quieter than the PAR but noisier than some of the more expensive quiet design pumps.. My observation is the more expensive pumps are not as reliable as the basic shurflo but others may feel differently.. I don't find the pump noise that objectionable.
__________________
Rick Davis 1602 K8DOC
61 tradewind, plus a few others
13 Ram 2500 TD
99 Dodge TD 577K miles

RickDavis is offline   Reply With Quote
Old 01-02-2012, 06:14 PM   #6
Rivet Master
 
Globie64's Avatar
 
1964 19' Globetrotter
The Sea Ranch , California
Join Date: Dec 2004
Posts: 1,377
Images: 18
Blog Entries: 3
Thanks, this is all interesting. I went ahead and bought a new shurflow- it's not a pressurized tank. I replaced most all of the copper with PEX, replaced faucets and with the pump we should be good to go. It all works well with city water, so far.
__________________
Wherever you go, there you are
Globie64 is offline   Reply With Quote
Old 01-07-2012, 11:42 AM   #7
1 Rivet Member
 
Brookfield , Wisconsin
Join Date: Dec 2011
Posts: 9
Market research

Under interest of full disclosre, I am a vendor doing market research of "those in the know", which by my question, am not relative to this issue.

I saw mention of pressurized tanks. Do any RV's actually pressurize the water tank? I am obvioulsy familiar with the small tanks used in typical "home well" pump systems, but didn't think anyone pressurized a large water holding tank. I say this as I would think putting much pressure on the tank would "alter the shape" (to say it mildly) of any plastic holding tank, and even any smaller gauge metal tank. Many have seen the high school physics class demo of filling a 55 gallon drum with an air compressor!

I would greatly appreciate your comments as perhaps we are missing a requirement of a needed version of a tank gauge!

Don
__________________
RTOS_1_LLC is offline   Reply With Quote
Old 01-09-2012, 04:11 AM   #8
Rivet Master
 
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
Join Date: Jul 2005
Posts: 2,941
Early airstreams used a steel fresh water tank and indeed were over pressurized with air from a small compressor or pumped up at the filling station. This meant that if you had a small leak in the system when you were running down the road the air pressure pushed all the water out through the hole and sometimes inside the trailer. The tanks were heavy and this fail mechanism caused the airstream company to go to pressure on demand water pumps.
__________________
dwightdi is offline   Reply With Quote
Old 01-09-2012, 10:01 PM   #9
Rivet Master
 
Globie64's Avatar
 
1964 19' Globetrotter
The Sea Ranch , California
Join Date: Dec 2004
Posts: 1,377
Images: 18
Blog Entries: 3
I think I've seen one of those tanks, round with the ends riveted on? The system reminds me of the windshield washer in my 1968 VW Squareback, a pressure tank driven by the air in the spare tire.
__________________
Wherever you go, there you are
Globie64 is offline   Reply With Quote
Old 01-10-2012, 10:44 AM   #10
1 Rivet Member
 
Brookfield , Wisconsin
Join Date: Dec 2011
Posts: 9
Market Research

dwightdi,

Thanks for the information. I ask as our system uses a pressure sensor and a "bubble tube" to monitor tank level. I can use a "differential pressure sensor" which means a bubble tube would go to the tank dishcarge line and a "second tube" would then be required to go to the top of the pressureized water tank. Thus the top tank pressure goes to one side of the sensor and the other side goes to the discharge line, where the "difference in pressues" would then allow me to measue the volume of a pressurized tank properly. However, as a market decision, and since it sounds like pressurized tank is an anomoly, it's not worth increasing product cost for everyone whom does NOT need this capability. I didn't think this was common, but being human, thought we might have "missed something". Thank goodness that is not the case! Thanks again for the information.

Don
__________________

__________________
RTOS_1_LLC is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Winterizing & Water Pump Access 27FB DMT Winterizing, Storage, Carports & Covers 28 11-17-2011 07:15 PM
PAR pump not working ckbailey97 Water Heaters, Filters & Pumps 9 07-14-2011 06:01 PM
Bad Check Valve in Pump??? tinbender Water Heaters, Filters & Pumps 3 06-16-2011 07:56 PM
Water pump leaking between head and motor Ezmoneybcs Water Heaters, Filters & Pumps 4 03-20-2011 07:32 AM
Is it a water pump or an electrical problem? Taj MaHaul Water Heaters, Filters & Pumps 7 01-23-2011 08:20 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:17 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.