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threaded or slip, should be the same - or at least I would think. Looking over at marinedepot.com, both are 1 1/8" but I just wanted someone to make me feel better about it.

You are correct about the bulkhead and hole size.

 

1/2" bulkhead requires 1-1/8" diameter hole

3/4" bulkhead requires 1-7/16" to 1-1/2" diameter hole

1" bulkhead requires 1-3/4" diameter hole

 

Jon

Yeah, what "she" said.

 

You are correct about the bulkhead and hole size.

 

1/2" bulkhead requires 1-1/8" diameter hole

3/4" bulkhead requires 1-7/16" to 1-1/2" diameter hole

1" bulkhead requires 1-3/4" diameter hole

 

Jon

That is trued for most standard bulkheads but for example Hayward fittings from what I recall need a slightly larger hole.

what's the difference between the standard and heavy duty? It sounds like I can start with 1 1/8" and dremel out if needed :why:

"Regular" bulkheads are made with "cheap" plastic and the heavy duty are Schedule 80. Much thicker pieces and much better threads. You won't strip the threads on a heavy duty bulkhead like you can on regular bulkheads. But then again, you shouldn't tighten them down with a wrench anyway. Hand tighten, and then 1/8th turn with a wrench if it dribbles a bit.

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