Hi all, sorry if this issue has been dealt with over and over but it's new stuff to me. Has anyone been able to resolve the NC24 float valve issue. I'm building a 24 and found at least one float valve is knackered, but found they are not available anymore. Also they were £45 each, can they be replaced with any others, maybe NC21 or 30.
Any help greatly received.

I found a company selling these new for only £13.20 each