RO Membrane Housing 4021

• These housing comes in the End Port and Side Port model.

• The Internal diameter of these vessels is mirror finished to a tolerance of ±0.1mm, due to this loading & unloading of membranes is very easy.

• Polyurethane paints are used for polishing & coating these housing, this provides UV resistance as well as excellent aesthetics.

• saddle and SS straps are supplied with all models.

• Warranty 1 Year against Manufacturing Defects Only

• Compact footprint — the shorter 4021 format fits installations where a full-length 4040 housing doesn't have the clearance

• Easy membrane loading/unloading — the ±0.1mm mirror-finished internal bore means smooth membrane insertion and removal

• Durable, weather-resistant coating — polyurethane paint protects against UV degradation for outdoor or semi-exposed installations

• Included mounting hardware — saddle and stainless steel straps ship with every unit

• Same reliable build as UKL's full housing range — consistent quality across UKL's 4021, 4040, and 8040 formats

Usage/Application - Commercial & Industrial

Model/Type - 4021 

Color - White

Size - 4040

Max Operating Pressure - 300 PSI

1. What is the difference between a 4021 and 4040 membrane housing?

Both share the same 4-inch diameter, but the 4021 is a shorter housing length than the standard 4040. Always match the exact housing length to your membrane element's length, not just the diameter.

2. What size membrane does this housing fit?

4021-format membrane elements — confirm your membrane's exact length before ordering, since a 4040-length element will not fit correctly.

3. What is the maximum operating pressure of this housing?

300 PSI.

4. What material is this housing made from?

FRP (Fiberglass Reinforced Plastic), coated with polyurethane paint for UV resistance and durability.

5. Does this housing come with mounting hardware?

Yes — saddle and stainless steel straps are included with all models.

6. What's the difference between End Port and Side Port models?

The difference is where the permeate outlet is positioned, affecting how the housing integrates with your existing pipe layout. Confirm which your system requires before ordering.

7. Why choose a 4021 over a standard 4040 housing?

Primarily installation space — if your system has a shorter available mounting length, or your existing membrane element is 4021-length rather than 4040-length, this is the correct match rather than a downgrade.