Pump out adapter (1 3/4")

NomadicOne

Hi, I have seen someone post the same question but there was no actual reply in the chain. I want to try one of the screw in adapters for the pump out station instead of having to hold the hose in place and make sure there is a good seal. The fitting measures 1 3/4" and cannot find one online. Has anyone ever seen one for sale one in this size?

Weber

I have seen the adapter but not sure if they were 1-3/4".

NomadicOne

West Marine and lots of online places have 1 1/4 or 1 1/2 for sale but I cannot find 1 3/4.

Stodge

Mine is a 1 1/2.  Are you sure about the size?  I believe they go by the thread size.

NomadicOne

I'll post a picture of the cap shortly

NomadicOne

Weber

Ok, that is not how they classify the size.  That is the cap size.  They call the caps and deck plates by the hose size.

 

Weber

For that deck plate you need the 1-1/2" adapter.

Weber

Features of the Holding Tank Quick Connect Adapter

• 100% Polypropylene constuction, non corrosive and chemical resistant
• Fits all 1 1/2" PP Cam Lock Waste Lines
• Fits all 1 1/2" NPT Deck mounted waste fittings (ensure your fitting is 1 1/2" NPT/IPS*, there are some 1/1/4", but usually on smaller vessles)
• Molded in "eyelet" for attaching lanyards or "keeper" lines

* Please note that 1 1/2" NPT or IPS fittings measure 1.9" (48mm) in diameter

dalek

Contrary to logic, a pipe thread size is the thread that goes on the outside of a pipe with that bore. Therefore a 1" NPT or BSP Thread will be 1.315" Diameter, not 1" Diameter.
1.1/4" Pipe thread diameter is 1.66"
1.5" Pipe thread diameter is 1.9"
11.5 Threads per inch for NPT (this thread is slightly tapered)
11 Threads per inch for BSP (this may or may not be tapered).
As Weber and Stodge say, it looks more like 1.1/2" than anything else.

JC290

That should be 1 1/2 fitting 

NomadicOne

Thanks guys, much appreciated!