Made by Waterway
This is 2" water manifold (which means it fits 2" plumbing) used for get water to the back of water jets, it has a female 2" 6cm hole on one end and a male 6cm on the other end and has 6 3/4" barbed connections.
If your current manifold has 1 end capped please use either a cap or a 2" insert to resolve this issue. Found in the 2" plumbing fittings.
You will need to clamp and glue the water pipe connections to the manifold to ensure it doesn't leak.