Seemingly impossible to find ……

[wizzer]

I’m looking for a “spare” top for my bronze sea water inlet strainer. It is a simple vertical tube type assembly with a male thread on top, to which fits a female threaded cap. I’m almost certain it’s a 1 3/4” BSP. Can’t seem to find that size anywhere.
Any ideas?

 

[tillergirl]

You could try Norris of Islworth. They manufacture: T.Norris Marine. Supplier of Propellers, Stern Gear & Marine Equipment

 

[pyrojames]

This is not exactly want you want but it might get you the end result you need.

1.3/4 inch FI to 1.1/2 inch MI BSP Thread Reducer - 42003196

It's the only 1 3/4 fitted I found!

 

[Boater Sam]

I think you will find it 1 1/2" If the pipe internal diameter is 1 1/2" then it is. Iron ones easy to find, brass not so easy bronze difficult. Could be admiralty brass or gunmetal too.

 

[penfold]

Are you likely to lose it? 1.75" does not appear to be a standard plumbing size, so if you want a spare you'll need to get one made or buy a used strainer just for the cap.

 

[LittleSister]

I think you will find it 1 1/2" If the pipe internal diameter is 1 1/2" then it is. Iron ones easy to find, brass not so easy bronze difficult. Could be admiralty brass or gunmetal too.

Brass 1 1/2" BSP blanking plug here -

Blanking Cap Fittings - BSP Female Plugs

 

[penfold]

The major(outer)diameter of 1.5" BSP is 48mm, it's not that size.

 

[wizzer]

You could try Norris of Islworth. They manufacture: T.Norris Marine. Supplier of Propellers, Stern Gear & Marine Equipment

I’ve dealt with them before & will have a look at what they’ve got
Cheers

 

[wizzer]

This is not exactly want you want but it might get you the end result you need.

1.3/4 inch FI to 1.1/2 inch MI BSP Thread Reducer - 42003196

It's the only 1 3/4 fitted I found!
[/QUOTE

Thanks for that, I may we’ll get one of those, it will do what I want ….

 

[Bristolfashion]

If it's just an emergency thing, would a section of suitably sized plumbing pipe, blanked off and with the appropriate jubilee clips work?

 

[wizzer]

Thanks, I’ve ordered a couple of these, see below.

 

[wizzer]

I’ve ordered a couple of the plastics reducers suggested above.
I intend to make up a fitting for the top of the raw water filter, to which I could attach the dinghy foot pump, to backflush the water strainer.

 

[wizzer]

It was and is a 1 3/4” BSP thread.
I managed to source a plastic reducer, 1 3/4” bsp to 1 1 1/2” BSP, so now I can make the required fitting.