O-Ring Sizes

[nikolay_zhelev]

Hi guys,

I'm doing annual o-ring replacement, but I've faced an issue. Can you tell me please what is the size of Scubapro MK25 low pressure port plug o-ring? Only for the plug.

Strangely enough, but the o-rings I'm using for LP hoses (M83248/1-011) are quite loose when I place them on the LP plug.

Regards,
Nick

 

[nikolay_zhelev]

Hi guys,

I found a very comprehensive answer to my question in the following topic: Scubapro O-ring Sizes

It's good to use the search function in the forum before posting

In summary:

LP Port Plug according to Scubapro maintenance manual is with AS3209-010 with EP70 +-5 o-ring.
HP Port Plug - AS3209-011 with EP 85 +5 o-ring - higher hardness rating, due to the higher pressure.

A good place to buy o-rings is: The O-Ring Store LLC, We make getting O-Rings easy! with excellent international shipping options.

Attached is a very useful document for MK25 first stage o-rings.