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Old 06-14-2015, 09:50 AM   #21
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Here is a link to the gauge. DOMETIC 318530002 - Dometic Corporation VACUUM TESTER GAUGE 318530002 - Boaters Plus

Best to use it by starting at the toilet. Turn off the water. Open the ball valve and lock it open. If you have a newer style toilet it has a latch that will keep the ball open. If you have an older style use a toilet bowl brush to hold it open. Hold open the ball, insert the gauge seal and let the hose pass through the brush bristles.

By placing the sealing device at the end of the gauge hose into the exit hole you can determine if it is leaking inside the bowl or between the bowl outlet and the pump. The standard for vacuum is specified in the instructions that come with the gauge. The seal will also close up the end of 1 1/2" hose also.

Once you work out where it is leaking then you can repair or replace what is needed. I once thought the specifications from Dometic were ridiculous but Waypoints system holds vacuum long past the factory specs.

Thanks!

We have two Vacuflush heads onboard. Both work fine and have been problem free but are now 14 years old.

This spring I purchased rebuild kits for both units plus both heads but haven't gotten around to doing the work yet. My thought is to quiet down the generators and do a premptive rebuild to learn the workings of them and prevent unexpected failures.

I'll buy that tester since it seems it would be pretty handy in diagnosing problems and at the very least verifying my rebuild prior to placing it into production.

Thanks!
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Old 06-14-2015, 11:23 AM   #22
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Let me also recommend sealing all of your hose connections. I use a Locktite sealant (pipe dope) that is used for sealing plastic pipe threads. I also double clamp everything with clamps that are smooth. I would also use the ones that are narrow (made for silicone hose) so there is room on the couplings for two. Between sealing with sealant and double clamping 90 degrees apart you are assured of less leakage.

Use the gauge as you said along the way to insure your leak free.
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Old 06-14-2015, 12:41 PM   #23
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And don't forget the shaving cream. If you want to find a leak you can't hear, you can't beat it. You just spray it around the vacuum connections and if there is a leak there it gets sucked in.

FYI on the orientation of hose clamps. Tests have shown it makes no difference in how the two screw sections of the clamps are located in relation to each other as to the quality of the seal. But if space on the nipple is limited, having them located 180 degs from each other can allow you to get them closer to each other and up on the nipple.
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Old 06-19-2015, 10:19 AM   #24
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Well try to clean and grease with no help. So I replaced the seal at the clamshell was not that hard to do but it still leaks at the clamshell some of the time just have to reflush. And will seal most of the time don't know what to do now
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Old 06-19-2015, 10:26 AM   #25
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Is the clam shell damage? Is it smooth or does it have a nick or groove on it?

Did you put the seal on correctly?
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Old 06-19-2015, 11:02 AM   #26
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seal

Seal was good fit I don't feel any damaged on clamshell it does seal most times just not all the time.
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Old 06-19-2015, 11:15 AM   #27
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Make sure you let it snap back when you release the pedal. Always replace the ball and shaft. It's just not worth repeating taking it apart over and over again.

Again get the vacuum gauge as it will help you in the long run!
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Old 06-26-2015, 08:41 PM   #28
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Found problem

Well I finally got time to look at it was a small scratch in the ball don't know how it got their but with a green scrub pad was able to smooth it out now it's sealing
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Old 06-30-2015, 10:42 AM   #29
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Well I finally got time to look at it was a small scratch in the ball don't know how it got their but with a green scrub pad was able to smooth it out now it's sealing
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Old 06-30-2015, 11:43 AM   #30
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Well mine just started acting up. No water or air leaks that I know of, but the vac pump keeps pumping, so I guess an air leak. It still flushes fine just the pump doesn't stop.
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Old 06-30-2015, 01:47 PM   #31
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Could be time for new duck bill valves.
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Old 06-30-2015, 03:14 PM   #32
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It sounds like the vacuum switch. See the article at this link:
http://marinediscounters.blogspot.co...fault.html?m=1
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Old 06-30-2015, 03:52 PM   #33
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Talking

If this just started all of a sudden then I to would be inclined to lean towards a gay fm switch. First though start with something very simple. If you put paper in you head then try lifting the foot pedal and filling the bowl with water. Do this several times and see if it helps. It could be something as simple as stuck paper in the duck valves.

You want to do lots of clear water flushings before you tear into things. This gives you a small piece of mind that you wont run into any danglers
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Old 06-30-2015, 08:00 PM   #34
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Vacuum switches very rarely go bad. And they are easy to test. So don't go out and buy a new one till you know for sure that's it.
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Old 06-30-2015, 11:36 PM   #35
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If this just started all of a sudden then I to would be inclined to lean towards a gay fm switch. First though start with something very simple. If you put paper in you head then try lifting the foot pedal and filling the bowl with water. Do this several times and see if it helps. It could be something as simple as stuck paper in the duck valves.

You want to do lots of clear water flushings before you tear into things. This gives you a small piece of mind that you wont run into any danglers
Man, typing on a phone sucks! I meant Vacuum Switch. Not sure what a gay fm switch is?
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Old 07-01-2015, 09:27 AM   #36
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Well I flushed it several times and its working, go figure.
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Old 07-01-2015, 09:35 AM   #37
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Sometimes starting with the simple stuff first is best!
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Old 07-01-2015, 10:06 AM   #38
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Well I flushed it several times and its working, go figure.
Not uncommon. Not sure if it relates to your situation Tim, but one of the biggest mistakes people make with these heads is not flushing enough water through them if there is any solids, including mere toilet paper in the flush; need to hold the peddle down for a three count. Flushing a nice big gulp of distilled white vinegar through every now and then doesn't hurt either.
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Old 07-01-2015, 11:10 AM   #39
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Man, typing on a phone sucks! I meant Vacuum Switch. Not sure what a gay fm switch is?
But...as of last week...they are acceptable in all 50 states!
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