Sorry for the delay in responding. Our boat is currently for sale and as such have not used the Spectra Setup I put together for several years. It would need a new membrane - but the design is straightforward and easy to operate. We enjoyed it, and were we still sailing - I can be certain still using it.
Be sure you have an adequate size intake and maybe consider dual filters (intake) to each of the 12v pumps. There can be flow loss with too small an intake and only one filter. We up-sided the valve and thru hull. Thank you for the drawings comments - glad they are helpful.