It may seem expensive to you but two of those 50mm PN18 Tee's would cost me $50NZD here so its a good deal.
The following uPVC pressure pipe fittings all Class 18 to AS1477.
50/50/50mm Tees Solvent joints - 9
50mm x 90 deg elbows Solv. Jt - 1
50mm x 45 deg elbow Solv. Jt - 1
50mm DECaps - 2
50mm Female Faucet adapt. Threaded BSP - 2
50mm Male Faucet Adapt. Threaded BSP - 2
25 - 20mm reducing bushes - 7
20mm solvent Jt. couplings - 9
32mm solvent Jt couplings - 9
20mm x 45 deg elbows - 1
20mm x 90 deg elbows - 3
32 - 25mm reducing bush - 2
3/4" flexible connectors - 4
20mm sockets BSP O.E. plain other - 4
20mm Thread. Faucet connector (male) and solvent female - 3
20mm flexible couplings - 2
15mm flexible couplings - 2
25mm faucet connector female BSP one end - plain other - 1

I've always wanted to make nine piston valves
