Phoenix Pre‑Filter for Phoenix Guardian R Air Scrubber Duct Cleaning This premium REPLACEMENT HEPA filter

This premium REPLACEMENT HEPA filter is engineered for the Phoenix Guardian R Pro HEPA Air Scrubber System

Suitable for Hydramaster CDS 4

A cap that doesn't seal properly can upset chemical draw and lets concentrate leak around in the van

600 PSI Maximum flow 7 GPM Inlet and outlet 1/4 inch male x 1/4 inch female Repair kits NA031A (older) or NA033A (newer) Maximum temperature Not stated by the manufacturer Manufacturer Not settled — see note above Frequently Asked Questions

It also swings further across the pressure range than any other tip in the set

Phoenix Pre‑Filter for Phoenix Guardian R Air Scrubber Duct Cleaning This premium REPLACEMENT HEPA filterOverview First stage pleated pre filter, 1" 18" 18". Phoenix part number 4031877. It is the first filter the air meets in a Guardian R air scrubber, and its job is to protect the HEPA filter behind it. What it fits Phoenix Guardian R air scrubber named as item 1 in the Guardian R Pro 50 Hz service parts list, Air Filter, Pleated, 1" 18" 18" The filter stack, and why the order matters The Guardian R runs a staged filter arrangement: Stage 1 pre filter