Collapsing Holding Tank

Liberty44140

Grabbed a couple pics of my set up. I did the diy filter two years ago and then when I saw wills set up decided to add the valve in line since the filter was already made. Inspired other boats around me to do the same in storage:

Dream_Inn

@liberty44140 , that looks exactly what I might do as well.  I have the larger valve that I drilled right in the tank, but I'm thinking this wouldn't hurt (we have some really strong pump outs in the area).  Liberty, did you just get it at home depot?

Liberty44140

Hi dream, yep bought from Home Depot. No stock at store so ordered online to store for free shipping. Used a T from Lowe’s. Could not find the exact one on Lowe’s site, here is the 3/4” version of what I used. Lowe’s Store had the 1/2” version in stock:

https://m.lowes.com/pd/Genova-3-4-in-x-3-4-in-x-1-2-in-Insert-Combination-Tee/3455018

valve:

https://www.homedepot.com/p/Eastman-1-2-in-MIP-Vacuum-Relief-Valve-60156/300702609

Dream_Inn

Thanks @Liberty44140!  I have my filter out right now (brought it home to refill), so I'll get it done this week.

GMSLITHO

how long is the 2 inch pvc pipe 

skennelly

cheaper option to the HD relief valve.  I think it would do the same job.

https://www.dripdepot.com/item/kinetic-air-vent-and-vacuum-relief-valve-protected-outlet-by-irritec-size-three-quarter-inch-mpt-w-pressure-check-no

aero3113

@skennelly , it seems like that valve is always open until the tank is full. Wouldn't it be releasing gases al the time? Unless I'm reading it wrong?

Willhound

This thread has me pondering, and realizing the suction on a powered pump out vac is huge, is it even possible to have too much venting? To the point it affects the ability to properly pump out the tank? I'm thinking probably not?

aero3113

I don't think so because the waste is really creating the the vacuum/pressure for the pump.  

Willhound

Ahhh. Yes. Not thinking straight. The outlet us at the bottom edge of the tank. Duhhh....

Dream_Inn

GMSLITHO said:

how long is the 2 inch pvc pipe 

I used 1.5" on mine and it is about 16 inches long.

skennelly

aero3113 - hmmm re-read it and I guess you are right..wouldn't work for this application.  Sorry.

Michael T

I have had 3 waste tank air intakes: factory, Big Orange and Tank Saver. Considering the alternative I don't think overkill is bad.