Avoid running the APO dry
Check the air filter and the inlet hose before you condemn a pump that is not making pressure
Cleaning solution temperature 110–129 °C (230–265 °F) under normal carpet cleaning conditions
Erratic pressure rather than a steady decline — a valve held open by debris
The tool is easy to clean out and even easier to service
Repair O-Ring Kit - HydraMaster Solution Valve Base UOM:EACH Avoid running the APO dryOverview O ring repair kit for the HydraMaster stainless solution valve. HydraMaster part number 000 078 019, listed as Kit, HM Solution Valve Repair and, in the tool manuals, as Kit, Wand Valve Plunger. The solution valve is the trigger valve in the wand or tool. It is opened and closed thousands of times a day, under pressure, in hot water and its seals are consumables, not failures. What it fits It services the HydraMaster stainless solution valve