This grout port ball stop helps prevent messy cleanup for concrete pumping applications. A pin in the ball stop can be pushed into the stream or drawn out without removing the coupling. Normally, a ball stop is attached at a tee in the pumping system or on the back end of a boom pump to prevent or catch the cleanout ball prior to entering the pump when cleaning the system. The product fits all brands of pumps and coupling from 2 to 7 in. Construction Forms Inc. 262-284-7800.