Re: Seacock for aft head

Mark Erdos

Hi Pat,


There are two types of BSP threads;

- BSPP - Female & male thread are both parallel (also known as G)

- BSPT - Female thread is parallel and the male thread is tapered


Since the ball valve is female on both ends it might be labeled as BSPP or just BSP.


Hope this helps.



With best regards,





Sailing Vessel - Cream Puff - SM2K - #275

Currently cruising - Tahiti, French Polynesia


From: [] On Behalf Of Patrick McAneny via
Sent: Monday, July 26, 2021 3:20 AM
Subject: Re: [AmelYachtOwners] Seacock for aft head


Mark ,I was thinking I wanted a valve with BSP threads , Groco has a BSPP thread. Is that what you bought and is what I need? I am not sure exactly the difference ,both are straight thread .



SM Shenanigans

-----Original Message-----
From: Mark & Debbie Mueller <brass.ring@...>
Sent: Sun, Jul 25, 2021 11:40 am
Subject: Re: [AmelYachtOwners] Seacock for aft head

Take a look at the Groco valve, I used this valve.  It has a grease zerk to keep the valve operating smoothly.
Mark Mueller
Brass Ring  A54

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