SimPure Whole House Water Filter Housing DB20P - Durable 20in Housing

In this review of the SimPure Whole House Water Filter Housing (DB20P) we look at who should consider this 20in x 4.5in BB-style housing and why. The bottom line: this housing is aimed at homeowners and light commercial users needing a robust pre-filtration shell that accepts standard 4.5 x 20 cartridges. The biggest reason to buy is its reinforced polypropylene construction and thickened threaded holes that improve long-term durability and reduce the chance of mounting leak paths compared with cheaper housings.

Key Features

• Premium construction: Reinforced polypropylene body resists chemicals and adds strength for long service life.
• Food grade materials: Interior materials are safe for potable water so all filtered water remains suitable for use.
• Upgrade design: Threaded holes are thickened and raised to address leakage complaints seen with some other housings.
• Built-in pressure release: The red pressure-relief button speeds and simplifies cartridge changes by releasing pressure before opening.
• 1in NPT brass port: Brass threads provide superior sealing for inlet and outlet connections when installed properly.
• Installation kit included: Comes with a wrench, steel mounting bracket and screws so the housing is ready to mount.

Who It's For

The SimPure DB20P is best for homeowners on well or city water who want a DIY whole-house pre-filtration option that accepts standard 4.5 x 20 sediment or carbon cartridges. It is suited to those who value a solid build and food grade materials and who plan cartridge swaps in a dedicated filter bay large enough for a 20in element.

Those who should look elsewhere include installers needing integrated filter cartridges or push-fit fittings included, and buyers who cannot accommodate the physical footprint of a 20in housing or who require manufacturer-supplied cartridges with the housing. Filters and push fittings must be purchased separately.

Pros & Cons

Pros

• Reinforced polypropylene construction offers strength and chemical resistance for whole-house use.
• Includes mounting bracket, wrench and screws for a straightforward installation.
• Brass 1in NPT threads and a pressure-relief button make maintenance practical and reliable when installed carefully.
• Accepts universal 4.5 x 20 cartridges for easy sourcing of sediment or carbon elements.

Cons

• Some users report sealability and leakage issues with threaded connections, so careful installation and correct use of sealing materials are required.
• Cartridges and push fittings are not included, adding to initial setup cost and parts sourcing.

Specifications

Product Type	Whole house filter housing
Size	20in x 4.5in
Port Thread	1in NPT brass
Material	Reinforced polypropylene, food grade
Included Accessories	Wrench, steel mounting bracket, 4 screws
Cartridge Compatibility	Standard 4.5 x 20 filter cartridges

Our Verdict

The SimPure DB20P is a sensible value for anyone building a DIY whole-house pre-filtration system who needs a durable 20in housing that accepts universal cartridges. Its reinforced body, brass threads and included installation hardware make it a practical choice, though buyers must allow space for the larger element and be attentive to threading and sealing during install to avoid leaks.

Frequently Asked Questions

Does this housing include filter cartridges?
Answer. No, cartridges and push fittings are sold separately; the housing accepts standard 4.5 x 20 cartridges.

What is the connection size?
Answer. The inlet and outlet use 1in NPT brass threads for robust plumbing connections.

Are replacement O-rings available?
Answer. Yes, compatible O-rings are available; search by the specified part reference for the DB20P model when ordering.