Champlain 1-1/2" MPT x 1-1/4" S Return Fitting (ACM-991-SF) controlsystemparts a 2-3/8 inch hole size

a 2-3/8 inch hole size

An adapter plate can make the difference between a topside installation that only works and one that looks properly integrated into the spa

and PRB12 references

clear tank lid to restore secure closure and better visibility

This product fits strong buyer intent for A&A low profile T-valve kit

Champlain 1-1/2" MPT x 1-1/4" S Return Fitting (ACM-991-SF) controlsystemparts a 2-3/8 inch hole sizeThe Champlain return fitting is designed for compatible pool plumbing applications where a 1 1 2 inch MPT connection needs to transition to a 1 1 4 inch slip fitting at the return point. A fitting like this is useful because it helps create the correct wall return connection while supporting a cleaner plumbing transition. This replacement is especially useful when the original return fitting is cracked, leaking, discolored, or no longer fitting