u/blackowen

I have a tank with a pump chamber and I'm thinking of putting a riser on it, so we can easily get to it in the frozen winter of NH. The photo shows two openings - the top 20" one goes to the pump chamber and the 16" one gives access to the other side of the wall/baffle where the main tank is. (There's another 20" access port on the other side of the main tank that's not pictured). The photo shows that there's only 2" from the edge of one port to the edge of the other. If I put a riser in for easy access to the pump chamber, I'm concerned that any riser adapter ring will overlap the access port to the main tank. Maybe this means I can't put a riser on the access to the pump tank?