[Griffus]

I am trying to change the membrane in a Champ 4000 Housing but can't get the thing open.

I have it apart but can't get the top off. I have managed to turn it but it doesn't appear to be loosening at all.

Any advice greatly appreciated.

here's a link the the actual housing: -

http://gapswater.co.uk/acatalog/AXEON-PVC-RO-Membrane-Housing-4--x-21---Champ-4021--2941.html

[Alex Gardiner]

I am trying to change the membrane in a Champ 4000 Housing but can't get the thing open.

I have it apart but can't get the top off. I have managed to turn it but it doesn't appear to be loosening at all.

Any advice greatly appreciated.

here's a link the the actual housing: -

http://gapswater.co.uk/acatalog/AXEON-PVC-RO-Membrane-Housing-4--x-21---Champ-4021--2941.html

I have struggled with a few of these myself in the past. The best way I have found is to get a pair of pliers and grip one of the vanes and twist it and wiggle it as you pull it off -  it usually pops off then.

Re-fitting it is best done by pushing into place and then hitting it back in with the rubber handle of a hammer.

[Griffus]

WOW, sorted now, but tough going.

Thanks Alex, it did come down to elbow grease and persistence. I put the handle of a socket spanner in the centre hole and used this to gain leverage as if unscrewing (which I thought I was until it eventually came off!).

Putting back together was also tricky, thank God it's not every week :-)

Now, time for home 

[windowswashed]

Or with one end off, connect a water supply to the membrane (closed end) whilst sitting on or tightly holding the housing, turn the water supply on to let the water force the membrane out naturally without using force, just the pressure of the water supply (mains) and make sure you catch it sliding out so it doesn't go flying

[Spruce]

Or with one end off, connect a water supply to the membrane (closed end) whilst sitting on or tightly holding the housing, turn the water supply on to let the water force the membrane out naturally without using force, just the pressure of the water supply (mains) and make sure you catch it sliding out so it doesn't go flying

What a good idea! Thanks. Just make sure all the air is out first.

This is how compressor's air tanks are tested. Water doesn't compress so if the receiver burst at 300 psi nothing would happen except water would run out - no damage or injury.

[Alex Gardiner]

Or with one end off, connect a water supply to the membrane (closed end) whilst sitting on or tightly holding the housing, turn the water supply on to let the water force the membrane out naturally without using force, just the pressure of the water supply (mains) and make sure you catch it sliding out so it doesn't go flying

This is a good idea  - I will keep this in mind if I use the champ housings again. I tend to mainly work with the EZ-Pure housings now which are different.