Buy this new valve as it can be a false economy getting a secondhand part.
I bought a secondhand one which was faulty so ended up getting this one which fixed the problem. It’s a simple job to change over but doesn’t come with any instructions so you need to be a bit handy. Would buy again.
I just needed the electronic component, but had to buy all the plastics as well. It's worked well fixing my problem. My only gripe the delivery, 2+ weeks diabolical.