not on an original river rat pump , it will expose the o-ring and cause it to leak , i tried and took it down to the oring and still would not fit . ended up with an extention from good vibes for about a hundy or so , im not 100 % on the RB deal but would imagine the same outcome .
thanks for the info. It came with the extension, ill just have to figure out exactly how it goes together. I know we had to use some shims when originally installed, but will definately give it a shot. Great pump glad I didnt ruin it