Hi Everyone. Well, after 15 years the RV-Dreams Community Forum is coming to an end. Since it began in August 2005, we've had 58 Million page views, 124,000 posts, and we've spent about $15,000 to keep this valuable resource for RVers free and open. But since we are now off the road and have settled down for the next chapter of our lives, we are taking the Forum down effective June 30, 2021. It has been a tough decision, but it is now time.

We want to thank all of our members for their participation and input over the years, and we want to especially thank those that have acted as Moderators for us during our amazing journey living and traveling in our RV and growing the RV-Dreams Family. We will be forever proud to have been founders of this Forum and to have been supported by such a wonderful community. Thank you all!!

Members Login
    Remember Me  
Post Info TOPIC: toilet and holding tank

RV-Dreams Community Member

Status: Offline
Posts: 1
toilet and holding tank


Gday from sydney australia,

doing a bus conversion at the moment and the design at the moment has the black water holding tank about 2 meters from the toilet is it possible to fall it that far without having issues in the future, i have space to provide plenty of fall.




RV-Dreams Family Member

Status: Offline
Posts: 1094

As long as it is a straight shot down, shouldn't be a problem. Ours has a 45° offset - and any bend is a place where 'material' can get hung up. Plenty of water is always required.


Barb & Dave O'Keeffe

2002 Alpine 36 MDDS (Figment II), 2018 Ford C-Max HYBRID

Blog:  http://www.barbanddave.net

SPK# 90761 FMCA #F337834

RV-Dreams Family Member

Status: Offline
Posts: 396

You don't say how far the drop is from the floor where the toilet will be mounted to the top of the black tank. That will determine the slope of the pipe. The plumbing from our toilet to the black tank runs at about a 45 degree angle. We've never had a problem with it. I "stix 'n brix" homes, the downward angles of the sewer lines are far less than that.



2012 F350 DRW Lariat 6.7

PullRite OE 18K, Demco Glide Ride pinbox

2020 Solitude 310GK-R, MORryde IS, disc brakes, solar, DP windows

Full-time as of 8/2015



RV-Dreams Family Member

Status: Offline
Posts: 1337

We have a 45 degree slope from toilet to holding tank. No clogging problems. Our down pipe is only about a meter long.


"Small House, Big Yard "

"May the FOREST be with you"
Alfa See-Ya 5'er and 2007 Kodiak C4500 Monroe

Page 1 of 1  sorted by
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us