WILDEN P4 1-1/2″ Stainless Steel AODD Pump: P4, XPS4, PS4

At 1-1/2 inch, Wilden makes three clamped stainless pumps. Together they account for 116 builds, which makes this one of the busiest sizes in the stainless range. Here are three representative part numbers side by side.

What the table tells a buyer

• The PS4 has the highest listed flow of the three, even with a PTFE diaphragm. It is also the smallest group, with nine builds.
• The XPS4 has the widest temperature range because of its aluminum air side, and the best dry suction lift on the pages we checked.
• The P4 is the lightest and is often the pump already installed. For a direct swap, matching the model is usually simpler than changing to another family.
• Tri-Clamp ports are common here: 22 P4, 28 XPS4 and 3 PS4 builds. The Tri-Clamp version of the same pump adds a few pounds, for example 56.6 lb (26 kg) for P4 build 04-13796.

PSG does not list a maximum solids size on these P4, XPS4 and PS4 pages, so we will not quote one. If your liquid carries particles, send us a description and we will check it against Wilden’s data for that build.

Example builds

All 116 stainless P4, XPS4 and PS4 builds: P4 | XPS4 | PS4