Just some information in case someone is replacing unions on a Hayward MPV. I bought these unions Flush Union 1-1/2 In Mip X 1-1 | Hayward Residential and Commercial Pool Products and was ready to install them directly on my MPV only to find the rings did not have enough clearance to have them installed on the return and pump fittings on the MVP. I had to extend the return line from the MPV and install the union after the extension. At this point, if Hayward were able to correct the placement, it would cause everyone to have to re-plumb so that is not an option but I certainly wish the engineers had actually installed all the components they sell before putting them on the market to make sure they can easily be installed!
