YD Scuba Diving Forums banner
1 - 6 of 6 Posts

·
Registered
Joined
·
1,771 Posts
Apart from drain the filter shell of air before attempting to removing the cap.

My only take on this for starters:

“Filters by there very nature fail.”

Once that’s sorted the rest is a piece of cake.

The only real trick is knowing when to change the chemical and what type to use.

Add that to change out too often and it adds cost and wastes time.

Leave in too long and you trash your cylinders with oil carry over and water.

But IMHO it all starts with the choice of chemical Molecular sieve, the back
pressure regulator setting (BPR or priority valve) if one is fitted and a £40
visual indictor showing in real time the purity of the air dispensed.

Failing any above three points, just buy the standard throw away Coltri filters
and change every 20 hours. It may be blind and expensive but it’s simple.

For a full work up post the filter cartridge and shell, both diameter and length
would help, as the 13 and 16 have used different types over the years.
Iain Middlebrook
 

·
Driving my truck with my high-heels on...
Joined
·
5,509 Posts
But IMHO it all starts with the choice of chemical Molecular sieve, the back
pressure regulator setting (BPR or priority valve) if one is fitted and a £40
visual indictor showing in real time the purity of the air dispensed.
As Ian said firstly be very carefull were you buy your Molecular sieve from , to many dodgy seller on ebay .
Visual indicator I do not have myself so Ian were from & type please ?
 

·
Registered
Joined
·
1,771 Posts
As Ian said firstly be very carefull were you buy your Molecular sieve from , to many dodgy seller on ebay .
Visual indicator I do not have myself so Ian were from & type please ?
Hey Colin

Spot on post.
Just looked at E-bay. Some joker (scuba-supplies) calls himself James selling molecular sieve for £14.50 a litre. That about @21.64 a kilo! He then adds £6.50 postage........What a rip! £28.14

If someone knows this clown tell him the very best medical grade sieve is £11 a kilo comes in 2.5 litre or 5 litre steel air tight UN specification certified steel cans, fresh.

Not some rinky dink plastic bag full of cracked sieve dust in a jiffy bag used for drying out old double glazed window panes.

If the poor lad that bought this rubbish is a YD member and would like a fresh sample of the proper stuff for free, email. :) Iain Middlebrook.
 

·
Registered
Joined
·
4 Posts
Discussion Starter · #5 ·
Hello Iain,

I can buy the refill sieve & carbon from the Coltri service technician.

The filter is 14" - 35.5 cm long and 1 11/16" - 40 mm ID

I appreciate your reply, Michel.
 
1 - 6 of 6 Posts
Top