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07-17-2018, 11:53 AM
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#1
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Junior Member
Join Date: Jul 2018
Location: Moundsville
Posts: 27
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Fullway termination valve
Hi I’m new to this forum just bought a new 5th wheel I used it this past weekend I tried to use the black tank flush valve when I turned the water on it didn’t sound like it was going into the tank and the hose was building up pressure I shut it off right away the dump valve was open any suggestions thanks keystone half ton🤔
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07-17-2018, 12:22 PM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,351
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Welcome to the forum!!
It sounds like the black tank rinser is either plumbed backwards or there is a blockage. If your unit is brand new, I would suspect the hoses were hooked up wrong at the anti siphon valve.
I don’t know the exact location of that valve in your unit because we don’t sell Keystones anymore where I work.
Sorry I can’t be of more help, but I’m thinking the hoses are hooked up wrong if it’s a new unit.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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07-17-2018, 12:32 PM
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#3
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,457
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Quote:
Originally Posted by chuckster57
Welcome to the forum!!
It sounds like the black tank rinser is either plumbed backwards or there is a blockage. If your unit is brand new, I would suspect the hoses were hooked up wrong at the anti siphon valve.
I don’t know the exact location of that valve in your unit because we don’t sell Keystones anymore where I work.
Sorry I can’t be of more help, but I’m thinking the hoses are hooked up wrong if it’s a new unit.
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Generally under the bathroom sink or in the wall behind the shower..
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2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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07-17-2018, 12:33 PM
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#4
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Junior Member
Join Date: Jul 2018
Location: Moundsville
Posts: 27
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It is brand new this was the first trip with it when i turned on the water it was like the hose was plugged
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07-17-2018, 12:37 PM
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#5
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,457
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it'll look like this..
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2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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07-17-2018, 12:42 PM
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#6
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Junior Member
Join Date: Jul 2018
Location: Moundsville
Posts: 27
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It’s all enclosed
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07-17-2018, 12:49 PM
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#7
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,457
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Quote:
Originally Posted by Keystone half ton
It’s all enclosed
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It isn't in the Black tank...
Look under the sink in the bathroom...
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2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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07-17-2018, 01:09 PM
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#8
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Junior Member
Join Date: Jul 2018
Location: Moundsville
Posts: 27
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I found it like you said,it makes a loop through the valve and goes to the tank I assume do you think that they put the valve in backwards
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07-17-2018, 02:17 PM
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#9
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Junior Member
Join Date: Jul 2018
Location: Moundsville
Posts: 27
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Is this the anti siphon valve if so could it be hooked up backwards, would that cause the hose to build up pressure and not clean the black tank
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07-17-2018, 03:09 PM
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#10
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,457
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Quote:
Originally Posted by Keystone half ton
Is this the anti siphon valve if so could it be hooked up backwards, would that cause the hose to build up pressure and not clean the black tank
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Most likely...
__________________
2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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07-17-2018, 03:16 PM
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#11
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,457
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__________________
2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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07-17-2018, 04:57 PM
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#12
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Site Team
Join Date: Feb 2014
Location: W. Texas
Posts: 17,695
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Quote:
Originally Posted by Keystone half ton
Hi I’m new to this forum just bought a new 5th wheel I used it this past weekend I tried to use the black tank flush valve when I turned the water on it didn’t sound like it was going into the tank and the hose was building up pressure I shut it off right away the dump valve was open any suggestions thanks keystone half ton🤔
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The anti siphon valve will do what you describe. It could be defective or backwards. You can fix it yourself, or, since it's new have the dealer fix it. You can spend $15-20 and be done with it or wait for a slot for warranty repair, wait for the fix and then get it back - that would be your call. If your dealer is nearby and efficient you may want to use them, if not ??
Mine was defective upon purchase. They just bypassed it and I use the anti siphon attachment Javi listed in the first thread.
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Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
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08-05-2018, 02:47 PM
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#13
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Junior Member
Join Date: Jul 2018
Location: Moundsville
Posts: 27
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The water supply line going to this is backwards can I just bypass this the way it goes on I would have to turn it up on it’s side
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08-05-2018, 03:22 PM
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#14
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,457
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Quote:
Originally Posted by Keystone half ton
The water supply line going to this is backwards can I just bypass this the way it goes on I would have to turn it up on it’s side
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Take the goofy plastic anti-siphon valve out and replace it with 2 - 90` elbows.. then use one of these on the outside hose connection... https://www.homedepot.com/p/Everbilt...Z4EB/205815672
A word of caution... always use a pressure regulator on this line... that cheap plastic in the tank won't handle much pressure above 40 psi..
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2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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08-05-2018, 03:42 PM
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#15
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Junior Member
Join Date: Jul 2018
Location: Moundsville
Posts: 27
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Thanks I will do that,
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