Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > General Discussions about our Montanas
Click Here to Login

Thread Tools Display Modes
Old 01-19-2020, 08:42 PM   #21
Established Member
Join Date: Feb 2019
Location: Brooksville
Posts: 33
M.O.C. #23468
Not to be a smart alec or anything--but can someone explain the easiest and safest method of cleaning out the black tank?? I don't know much about physics or PSI or pound /square mm.etc (LOL). When I empty my blcck and grey tanks and put the cap back on---the next time I take the cap off to attach the "******* " hose as my wife calls it about 3 gal of nasty stinking sewer water comes out-----does that mean the gate thing when I push it back in isn't completey closing off the black tank and it's defective???
Gutz54 is offline   Reply With Quote
Old 01-19-2020, 09:23 PM   #22
Montana Master
Join Date: Dec 2005
Location: Eugene
Posts: 966
M.O.C. #5091
I had that same problem like everyone else until I bought the slide gate that fits on the end of the black dump pipe. The slide gate under the plastic cover doesn't always seal and thats why you have that ugly discharge when you take the end cap off. Took me too many years to figure out I needed that extra twist on dump slide.
bigred715 is offline   Reply With Quote
Old 01-19-2020, 10:17 PM   #23
Carl n Susan
Site Team
Carl n Susan's Avatar
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 4,166
M.O.C. #4831
There is usually residual "gunk" in the 3" lines (black and shower) due to a lack of significant slope to effectively drain everything. There is about 4+' of line after the valves that can hold the stuff. *IF* you raise the front and tilt up on the left (for the black tank) and down (for the grey tank), you will extract much of the fluid. But few do that (unless you are going to change out a valve). A Valterra twist on gate valve at the end of the dump pipe stops the "gunk" from taking you by surprise.

I do think 3 gallons is excessive and may indicate a leaky valve.
Carl (n Susan) Youngren
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB

Carl n Susan is offline   Reply With Quote
Old 01-19-2020, 10:21 PM   #24
Established Member
richeyb's Avatar
Join Date: Sep 2018
Location: Mountain Home
Posts: 22
M.O.C. #22661
When flushing the black tank I make that my sole focus and rather than using the clock to judge filling the black tank I use the light gauge and fill it halfway then walk around and turn the water off. Havenít totally filled it using the gauge. Guess if you gauge seems faulty this wonít work.
richeyb is offline   Reply With Quote
Old 01-20-2020, 05:34 AM   #25
New Member
Join Date: Nov 2019
Location: Talladega
Posts: 4
M.O.C. #25248
Originally Posted by rjlamb View Post
While using the Camco Blaster Pro tank flush adapter this morning, I experienced a major problem. Several minutes into the second filling, the black tank fractured its lid and water flowed everywhere. I removed the unitís chloroplast underbelly and could reach up and lift the damaged section of the tank lid and reach inside the tank. My tank # is HT 543 from Keystone. My RV is a 2014 293RK HC. Where in the Palm Springs area should I begin looking for a replacement? If the roof vent on the tank is clear, how could pressure blow the tank?
I also had the same problem about 2 years ago. The only support for these tanks are on the side mounted rails. As they fill the tabs start to hold all of the weight and the top starts to expand. Remember the only thing holding your pipes on top of the tank are a thin layer of ABS glue. My vent pipe just popped right off and I found where my lid was cracked on the upper right corner.
I removed the underbelly and the tank. I removed the lid and repaired the right side with my own ABS patching I made with ABS glue, ABS pipe shavings and screening material. I then used the same glue to reseal the lid and vent pipe attachment. I screwed in strips of 1/8 steel around the lid for extra reinforcement and then I put 2 straps(with water hose in between to prevent chaffing) on both, my grey and black tanks.
I have never had anymore issues with my tanks.
sptpfx is offline   Reply With Quote
Old 01-20-2020, 08:02 AM   #26
Montana Master
Join Date: Aug 2009
Location: Grand Rapids
Posts: 1,601
M.O.C. #9561
If you can't fix the tank yourself get it into a dealer. figure it will be around $1100 to replace.
mazboy is offline   Reply With Quote
Old 01-21-2020, 10:03 PM   #27
DebNJim B
Montana Fan
Join Date: Jan 2018
Location: Northville, NY
Posts: 343
M.O.C. #21158
A lot of calculations on psi and so on and how long it takes to fill the black tank. I see it this way once the nozzle of the tank flush is under water it is not flushing anymore. The purpose is to spray water around the inside of the tank to wash the junk out. I start my tank flush with the gate valve open and let it run for about 10 minutes or until it's clear. Then I shut the gate valve for no more than a minute or two and open it back up usually seeing more paper and poo at the clear section of drain pipe. I repeat this procedure until all runs clear or near clear. I see no advantage to pressurizing a black tank at any level. This job is dirty enough as it is. Plumbing law no. 1, S--t runs down hill...let it run.
Jim B
2017 Lariat F-350 FX4, CC, SB, 6.7 PSD 4WD
2018 MONTY 3731FL, Residential Refer
DebNJim B is offline   Reply With Quote
Old 01-22-2020, 07:50 AM   #28
Montana Fan
margerush's Avatar
Join Date: Oct 2017
Location: Riverview
Posts: 149
M.O.C. #20713
Hblick48, I'm getting one of these flowmeters, great idea. hubby is the one filling & dumping the tanks, while I'm the one in & out of Monty checking the level of the tank sensors. The black tank sensor is wrong sometimes when paper gets stuck on the sensor.
2016 3160RL
2016 RAM 2500 4X4 Mega cab
margerush is offline   Reply With Quote
Old 01-22-2020, 11:04 AM   #29
Montana Master
mhs4771's Avatar
Join Date: Dec 2009
Location: Sebring
Posts: 2,608
M.O.C. #9969
I have switched to using a flow meter while dumping. Originally was timeing the flush, but water flow and pressure effect how much water can flow in a specific period of time.
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
mhs4771 is offline   Reply With Quote

Thread Tools
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
Forum Jump

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 08:10 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.