Thread Tools Search this Thread Display Modes
Old 03-27-2010, 10:13 PM   #1
1 Rivet Member
fatwgn's Avatar
1965 20' Globetrotter
Janesville , Wisconsin
Join Date: Jul 2009
Posts: 13
What Size Graywater Exit (opinions please)

Currently (or still) working on a 64 Tradewind - am in the middle of a floor replacement and am going to install two 15gallon tanks in the two frame bays behind the axle, tee them together for 30gallons - my local rv dealer recommends using 1.5" outlets on tanks ??? What opinions does everyone have on outlet size for graywater
1.5" or 3" most new rv's have 1.5
The tanks I plan on using are from HT169C
Thanks for the help
Attached Thumbnails
Click image for larger version

Name:	May_Oct.2009 086.jpg
Views:	76
Size:	42.8 KB
ID:	98949  

fatwgn is offline   Reply With Quote
Old 04-23-2010, 05:44 PM   #2
2 Rivet Member
1977 25' Tradewind
Ft Myers , Florida
Join Date: Feb 2010
Posts: 68
I am remodeling a '77 Tradewind. Have removed the rear bathroom which, due to condition, required destroying and removing the black water tank. Had considered adding a second grey water tank but hadn't yet found a source. Thanks for that.

I too am considering a 1.5" exit. Bought a new exit valve but haven't figured out all the transition/conversion joinery to get out the large hole at the bumper location. Actually have a plumber coming tomorrow to help figure the whole thing out. Without the bath and the black water tank I have some room to work with. It may take a while if I order a second tank, but will post updates and photos.

Mike & Laurel
Ft. Myers, FL
1977 Airstream Tradewind
2016 RAM 2500
FL Crackers is offline   Reply With Quote
Old 04-23-2010, 06:43 PM   #3
Rivet Master
RickDavis's Avatar

1961 24' Tradewind
1969 29' Ambassador
1970 21' Globetrotter
Jamestown , Tennessee
Join Date: Jul 2008
Posts: 1,780
Gray water tanks typically have a 1.5 inch outlet with a valve that size and then T into the same 3 inch outlet (after the black valve but before the sewer connector) as the black tank.

In my case When i added gray water storage I kept it totally seperate so I have 2 3 inch valves and hose connections. This would be a bit inconvenient if you are in parks with sewer connections most of the time but since we are boondockers it is little problem to move the hose from one outlet to the other when dumping tanks
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 04-24-2010, 04:17 PM   #4
Vintage Trailer Supply
Commercial Member
VintageRV's Avatar
1956 22' Caravanner
Vintage Kin Owner
Montpelier , Vermont
Join Date: Feb 2002
Posts: 126
Gray Water

Our vintage-sized gray tank comes equipped with a 1-1/2" recessed FPT fitting for the drain, which as Rick says, is the industry standard. Here's a link...

We tried to size it to be ideal for 1950s and 1960s Airstreams. It is rotomolded polyethylene.
Steve Hingtgen
Vintage Trailer Supply
WBCCI #1573
VintageRV is offline   Reply With Quote
Old 04-27-2010, 06:50 PM   #5
1 Rivet Member
fatwgn's Avatar
1965 20' Globetrotter
Janesville , Wisconsin
Join Date: Jul 2009
Posts: 13
Thanks for the info - I have previosly ordered from you and your products are great - I have been on about a 4 week delay - my father in law had a heart attack and we have been helping the family get better - so things are getting back on track now and maybe I can get back to work - I really want to get back to work on this project -
fatwgn is offline   Reply With Quote

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
Practicality of trailers without a graywater tank Jammer Waste Systems, Tanks & Totes 10 02-05-2010 09:01 PM
Home-made graywater tank bhpowell Waste Systems, Tanks & Totes 9 08-12-2009 04:34 AM
Help! Graywater backing-up into bathtub / won't drain team_no Waste Systems, Tanks & Totes 5 01-01-2008 06:15 PM
graywater transfer pump urbanfood Waste Systems, Tanks & Totes 11 11-29-2006 10:59 AM
Broken graywater tank Eric74 Waste Systems, Tanks & Totes 1 07-15-2004 11:14 AM

Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:50 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.

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