restriction question.

[laketime]

does anyone know if a tsunami t-800 is strong enough to push open a 3/4 or 1" check valve? or will this cause to much restriction? im betting that a swing check will work better, but i already have them after 2 of my pumps, and sometimes they get stuck shut and i have to reach down and shake them a little bit to get them to open. just thinking of trying something else.

[chpthril]

does anyone know if a tsunami t-800 is strong enough to push open a 3/4 or 1" check valve? or will this cause to much restriction? im betting that a swing check will work better, but i already have them after 2 of my pumps, and sometimes they get stuck shut and i have to reach down and shake them a little bit to get them to open. just thinking of trying something else.

I'm guessing you have a plunger style check-valve. What part of the system are they being used, fill? If they are after the fill pumps, you may not need them and can go with out.

[ragboy]

Yes, I just got my swing check valves in the mail. These are def the ticket. they open and close with the slightest pressure. thanks for the tip on those chpthril.

[majestic]

Yes, I just got my swing check valves in the mail. These are def the ticket. they open and close with the slightest pressure. thanks for the tip on those chpthril.

Do you have a part number for those? May need them soon.

[laketime]

yeah i would be using it after the fill pump, and it is a plunger style valve. and really? you don't need a check valve there? it wont empty itself??
and i agree i think swing checks are probably the best way to go. but im using old inventory parts from our shop, so i've used all the old swing valves and all i have left are the plunger style.

[ragboy]

I still like the plunger on the vent, cause even though causing issues, I need those babies full, and stay full. But here is where to get the swing valves. I am going to drive to this place on saturday.

http://www.plumbingsupply.com/pvccheck.html

[dogbert]

Thanks for the link, those look awesome!

[chpthril]

yeah i would be using it after the fill pump, and it is a plunger style valve. and really? you don't need a check valve there? it wont empty itself??
and i agree i think swing checks are probably the best way to go. but im using old inventory parts from our shop, so i've used all the old swing valves and all i have left are the plunger style.

You can do away with c/v's in the fill line by running the hose in a way that at some point, it loops up higher then the fill port on the sac when full. This high spot breaks the siphon. If you need to use the c/v's, dont mount the vertically! The weight of the water left in the fill line will sit on top of the door and hold it shut. This may prevent the pump from purging air and could contribute the vapor lock issue common with aerator pump systems.

[laketime]

so this is going to befor my front sac. if i run from the manifold in the back, up as high as i can in the side srorage area, then drop down to my fill port that should be enough even under exceleration that it wont siphon?

[chpthril]

so this is going to befor my front sac. if i run from the manifold in the back, up as high as i can in the side srorage area, then drop down to my fill port that should be enough even under exceleration that it wont siphon?

I did mine that way, running a pair of V-drives, and had no siphoning. I put a c/v in the front fill line, but after I got the hose run up front like I wanted, it when up and over the bulk-head wall and was way higher then the bow sac, so the c/v ended up not being needed as bell. In the fill lines, a c/v can contribute to the vapor-locking in the pumps, if the c/v is mounted vertically. Water left in the hose sits on top of the flapper and does not allow the air trapped in the pump to purge. Xpjim discovered this on his and eventually removed or relocated them.