Question about Perdix and Transmitter Rubber O-rings

[cmcdarris]

I like that the Perdix has double O-rings on the battery compartment “cap”. However, the transmitter only has 1 O-ring on the battery compartment. I just got my Perdix last fall and am wondering how often these O-rings should be changed. I’m thinking 1x every year. Any experience or thoughts?

 

[runsongas]

recommendation is when you do the battery change, size 016

 

[Divin'Papaw]

I replace mine annually when I replace the battery.

 

[mnjhuz76]

I replace mine annually when I replace the battery.

Same here, just did it yesterday - well spent 2 bucks once a year.

When replacing the O-Ring keep in mind to pull it over the slotted side of the cap, not the threaded side to avoid damaging the new ring

 

[hedonist222]

I wonder why Shearwater didn't include a spare or two in the box.
I mean they did include a pair for the unit battery - why not the transmitter?

I'm only asking because its difficult if not near impossible to find shearwater-grade o-rings here.

 

[loosenit2]

"shearwater grade o-rings?" that's a new one.

 

[hedonist222]

"shearwater grade o-rings?" that's a new one.

The grade /specification of o-ring that Shearwater requires.

No need to be pedantic - you know what I meant.
Now get to diving!

 

[Must_dash]

What size is the computer battery O-ring?

 

[HKGuns]

What size is the computer battery O-ring?

Computer:
Size AS568-016, Nitrile (Buna-N) A70 2x
Also listed as: #112, 70D, Buna-N (Nitrile, NBR)

Petrel Battery Cap O-Ring Guidelines - Shearwater Research

AS568-016 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring [B70016] : The O-Ring Store LLC, We make getting O-Rings easy!

 

[rsingler]

Size AS568-016, Nitrile (Buna-N) A70 2x

Where have you seen a specification of an -016, please? That is a much thinner oring, and I would be surprised if it sealed reliably. The -112 is what I use.