RESOURCES > Maintenance > Procedures > High-Pressure

Low Pressure Canister Filter Caretaking

The low pressure water cannister filter is a recent add-on we provide to all customers. The filter has a 200 mesh filter and can strain out large particulate from the water supply, protecting the pump and maintain its longevity. This product also has a feature to clean and flush away trapped particulate, to maintain its performance.  

The filter cannister is a mechanical system and has multiple threaded interfaces and seals. This guide will take your through general maintenance procedure that are necessary to keep your canister filter free of leaks, clogs and other common issues .

Tools needed

  • Teflon Tape

  • 11mm wrench

  • Adjustable Wrench

  • Rag

  • Canister Wrench (provided)

Leaking from the low pressure gauge

  • The low pressure gauge is threaded onto the filter cannister brass body. However, if the Teflon tape is not of appropriate thickness, or thread sealant was not applied correctly, water may seep out from the gauge stem.

  • Please refer to this page for the pressure gauge leaking rework instruction

Leaking from brass-plastic interface

  • The plastic filter casing is threaded into the brass casing. Between them there is a rubber O-ring that does the sealing. Sometimes the rubber O-ring may be warped upon tightened, causing the leak.

  • Leaking caused by a warped O-ring can be easily resolved by loosening and re-tightening. Please use the cannister wrench to loosen the plastic casing, then carry on removing the casing.

  • After the casing is removed, check the integrity of the rubber O-ring. Correct its placement if it is misplaced.

  • Reassemble the plastic casing back, use the cannister wrench to tighten the casing.

Leaking from the water hose connectors

  • The push-to-connect hose connectors are threaded onto two brass compression fitting. Both the push-to-connect and compression fit connectors are sealed by gaskets.

  • If water is leaking from the interface between brass compression fitting and filter brass casing, please shut off the water supply, then loosen and remove the brass connector. Check the gasket orientation and condition, and reassemble the brass connector. Please see the picture below for an exploded diagram of the brass compression fit connector.

  • If water is leaking from the interface between plastic push-to-connect and brass compression fit connector, please shut off the water supply and remove the plastic connector. Check the gasket in the plastic connector, then tighten the plastic connector. Please see the picture below as an exploded diagram of the plastic push-to-connect.

Over-Tightend Flush Knob

Background

The filter cannister has a flushing function. You may engage the flushing by turning the top knob clockwise. What the knob does is to rotate and pull up the central filter core, in the meantime the scrapers blades on the plastic casing scrape the filter core. The upward motion of the filter core exposes a discharge port at the bottom of the cannister, and closes the output port. This allows input water to carry away the trapped particulate to be flushed out of the filter cannister.

After the flushing is completed, you may turn the knob counter-clockwise to move the central filter core down, blocking the flush port and allowing water to flow to the output port.

In some rare cases the flush knob can be over turned in either direction, which either derails or jams the center core into the mechanism. If this happens, you will see the flushing port being kept closed, or kept open, effectively rendering the filter useless.

If this happens, please turn off the water input, dismount the filter from the bracket, and follow the steps below to perform some repair.

Procedure 

  • Use the canister wrench to remove the plastic casing, exposing the central core.

  • If the central core comes out with the plastic casing, that means the central core is derailed.

  • Pull out the center core from the casing.

  • Thread the core all the way back into the thread on the brass casing.

  • At this moment, the core is in the highest point, i.e. flushing position. Do not turn the flush knob further in the “flush” direction.

  • Re-attach the plastic casing

  • If the central core does not come out with the plastic casing, but stuck into the brass casing, that means the central core is jammed.

  • Use a 20mm wrench to loosen the central core from the brass casing.

  • Check the threads on the central core before moving on.

  • If the threads are fine on the central core, re-seat it back into the brass casing all the way.

  • At this moment, the core is in the highest point, i.e. flushing position. Do not turn the flush knob further in the “flush” direction.

  • Re-attach the plastic casing.

  • You should be able to open or close the flush port at this point,

If central core is too tightly jammed into the casing and cannot be removed without damage, please contact customer support at support@wazer.com

RESOURCES > Maintenance > Procedures