OK Ruth lets play.
Here is the idea. I am assuming your tank is 6 feet long and about 24 inches tall and has dual overflows on it. We are putting a closed loop n it using a OM 4 way with 1 1/2 in and 1 1/2 outputs based on version 3 which opens up output port 1 and 3 at the same time and 2 and 4 on the opposing cycle. This is a better version as these ports will be open for 30 seconds per.
Ok here is an option. I want the OM unit to be placed dead center on the tank with the motor facing the tank and the input of the om facing out. The plan would be to have two 1 1/2 thread by thread bh's on the side of the tank near the overflow (shown on drawing) coming out of the we would screw in (using silicone) a 1 1/2 male adapter. from their we would use a 1 1/2 elbow on the top one and a 1 1/2 tee on the bottom one. Then glue those two together and run the piping down to the input of your hammerhead.
Coming out of the pump we would use 1 1/2 piping (hard pipe) to the location of the OM unit, on the input of the OM unit we would screw in a 1 1/2 male adapter with silicone. then attach a 90 to this adapter and then join it into the pipe coming up from the pump. Somewhere along this pipe coming from the pump to the OM and also on the pipe coming from the drain holes to the pump we want to install a ball valve and a union so we can disconect the pump down the line for maintence purposes.
Ok so now we have water coming from the tank to the pump and then from the pump to the OM unit. Now we need to build the manifolds. I figure that if we have 4 outputs per opening we wont loose to much in the way of flow. So with two 1 1/2 inch port being pen at the same time from the OM unit, we can split them into 2.
Each manifold will feed two 3/4 inch BH's. So we would have a 3/4 inch thread by thread BH. On the backside of the tank we would screw into it a 3/4 by 1 inch threaded nipple, into that a 3/4 threaded female by 1 1/2 male slip bushing. To buld the manifold that joins to these we will do it with two 1 1/2 inch 90 elbows and one tee joined together by 1 1/2 piping. the 90's will slip onto the bushings and the tee will be dead center of the two point to the floor. Attached to the tee we will glue a 45 degree elbow. This will point the plumbing towards the OM unit. On the om unit we will attach 1 1/2 male adapter and then join the om output to the manifold via a 1 1/2 inch peice of spaflex piping. This procedure will be redone for all four manifolds.
Take a peek at the drawing and tell me if it makes sence??
Mike
