One Way Valve Question

[112motorsports]

I was reading in some other forms that the one way sump pump valve is the way to go if you boat is going to sit in the water without moving since it won't let watter in like the scuper will. However on that valve is in the ski and for some mis fortune it falls it will be a pain to remove it and fix. So my question is has anyone had any of these valves fail on them? I am looking to put this in the ski and or just run a couple of bilge pumps. Let me know what all of you think. Thank you for your response and your time. Happy New Year.

 

[Mark44]

The one way vales I have put in I made sure I left enough room on the back of the ski for a scupper valve to be installed over the 2” outlet pipe incase of failure.

If the one way valve would fail you can just install a scupper of your choice and run a rod through the one way valve to break the check vale out. One I installed was leaking one day but it had some crud stuck in it keeping it from closing but cleared its self out.

Mark44

 

[beachedflunkey]

Yep. But don't expect the sump valve not to leak either... You can always use a threaded pvc fitting at the rear so you can plug it in the flats.

 

[djkorn1]

Throw in a Rule-Mate 750 Auto Bilge with built in float switch. The second your ski gets more than an inch of water in it, it spits it out.

You'll never sink even if the one-way leaks. Plus, no switch needed.

 

[Mark44]

This may sound funny but I like my scupper to leak a little. When the St. Louis crew stays over night on rides we leave our skis at the waters edge. I don’t worry about mine floating off because it fills with water as it sits on the beach or bank and the added weight keeps it anchored. I use 24-7

Mark44

 

[LBE]

I have heard of a few people blowing out their one way valves. I think most run the blowsion one that just "bolts in". The problem with thier scupper, imo, is that the flap is so far back. When you come in tail first there is a lot of pressure directly on the flap. I have been running the home depot check valve for over a year now without any problems. It doesn't leak at all. I believe that is because I have it mounted at the firewall. When it sits, there is a whole tube of water pressure to hold it shut, not just the last 2 in of water like when they are mounted toward the rear. Also there is no direct pressure on the flap on tail landings. The tume empty, when ridding has air in it, if you come in tail first the pressure might force water part of the way up the tube, but it wont hit the flap. I think of it like taking a cup of water and submersing it upsidedown in water. The air pressure will prevent the water from filling the cup.
What a ramble.

Point is, I think there is less chance of failure if you mount the valve near the firewall. Has been working for me for aver a year.

 

[Idok]

This may sound funny but I like my scupper to leak a little. When the St. Louis crew stays over night on rides we leave our skis at the waters edge. I don’t worry about mine floating off because it fills with water as it sits on the beach or bank and the added weight keeps it anchored. I use 24-7

Mark44

but if enough water sits in there, then you must DEPEND on the following:

your starter O-rings are perfect
Your front cover seal is perfect

your Intd bearing/shortshaft seals to be perfect......



a dry boat is a happy boat!

 

[Mark44]

but if enough water sits in there, then you must DEPEND on the following:

your starter O-rings are perfect
Your front cover seal is perfect

your Intd bearing/shortshaft seals to be perfect......



a dry boat is a happy boat!

How did you know they are perfect. Thanks:biggthumpup:

Mark44

 

[meatball]

Are there any 1 1/2 or so one-ways that would go on 1 1/2 inch tube with low profile? You could install a 2 inch PVC tube in the ski, then run a another tube (1 1/2) with the one-way, and then seal up the difference in diameter (mabye epoxy or silicone on a washer or something). That way if it breaks, you unseal it (cut some glass, whatever), and put in another one.

 

[Crab]

I compared the 1.5 inch to the 2 inch, and it looked to me like the smaller one wants to seal up easier. I did the smaller only because there is very little room for the larger one, probably not enough. Combine that with 1 Attwood 500 manual and 1 Rule 500 automatic, I should be set. Turn the Attwood on when going out, but leave the auto pump on at the beach. No need for the stock siphon pump, I will use the tube for dual cooling.