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Old 04-13-2021, 10:36 AM   #1
Mini-Skoolie
 
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Adding a bulkhead drain to a grey tank

I got my grey tank with 2 3/8" fpt bulkheads on the bottom. I want to add a 3/4 fpt bulkhead so i can attach a 3/4 electronic ball valve to remotely empty it. I got a brass 3/4 ID bulkhead 1.25" OD mpt with two rubber washers and a nut but im trying to figure out the best way to secure it considering i have no way to access the inside of the tank to put the nut on it. Any tips?

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Old 04-13-2021, 10:48 AM   #2
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What material is your tank made of?
Jack
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Old 04-13-2021, 12:29 PM   #3
Mini-Skoolie
 
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Quote:
Originally Posted by ol trunt View Post
What material is your tank made of?
Jack
Polyethylene
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Old 04-13-2021, 12:30 PM   #4
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If you check Amazon, they have a wide variety of poly reducers/adapters to get you where you want to be.
They might even have them in brass if you prefer metal?

Or simply find a solid 2-3/8 MPT bung plug and drill it out to fit the valve?

Gonna build a sneaky release for your gray tank to be able to empty while tooling down the road, eh???
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Old 04-13-2021, 12:50 PM   #5
Mini-Skoolie
 
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Im worried that 3/8 will get clogged quickly so i dont really want to use those.
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Old 04-13-2021, 03:42 PM   #6
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look into spin on self welding fittings for poly tanks
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Old 04-13-2021, 04:03 PM   #7
Mini-Skoolie
 
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Anyone use a uniseal with a pvc pipe capped off up high for access inside to clean the tank later on?
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