Spectra does have the easiest membrane vessels to
work on and certainly leaving enough room to remove a membrane is nice. But room and sailboats are an oxymoron. Also, Crusier RO is a very nice guy. But when he tells you that all membranes are the same he is incorrect. I've been through this so many times on this and many boards I won't go into yet again. But I assure you, Spectra and the other large
watermaker companies are not getting their membranes from the
Internet. I can tell by looking at the pic that the membrane you removed is an old membrane and most likely the original Spectra one that came with the unit. If you look at it, you will see
serial numbers. If you are the original owner of that CAT300 you still have a very important warranty on the Clark
pump. If you have a problem Spectras gonna want to see
serial numbers. The other
Internet cheap guys won't be there when Spectra says "Sorry Charlie" Please understand, I'm not telling you what or how to do anything. Take my experiance and my $.02 opinion for what it's worth. But for a
watermaker that will cost about 10K to replace, saving a few extra hundred dollars every 5-8 years doesn't make sense to me. But then I'm
funny that way. Leave the
cheap stuff to the
DIY watermaker guys.