Pentair PBH-420-1 20" Bag Filter Housing with 1" NPT Ports

Outstanding chemical compatibility ideal for use in a variety of water treatment applications.

Pentair Bag Filter Housings keep your system on stream longer by reducing bag filter change time. The Pentair PBH-420-1 is made of lightweight corrosion resistant polypropylene to give you all the strength you need without the weight. The PBH-420-1 accepts a standard 4" × 18.25" filter bag (commonly referred to as a 20" filter bag).  Dimensions allow for 1" (25mm) overlap on the basket.

Can also be installed as a duplex system for totally uninterrupted flow rates. Pentair PBH-420-1 bag filter housings come complete with gauge, wrench, and 3/8" drain valve.  The single large ACME thread closure ensures quick opening and positive sealing.

Filter bags are available in polypropylene felt, absolute-rated high efficiency polypropylene and nylon monofilament mesh, ideal for filtering and straining applications from as low as 0.5 micron up to 800 microns.  

Moulded from rugged reinforced polypropylene, Pentair bag filter housings offer outstanding chemical compatibility and are ideal for use in a variety of low-flow applications. These applications include residential pre-filtration, food service, along with commercial and industrial applications for water filtration and chemical filtration. They are equipped with a black reinforced polypropylene cap.

FEATURES AND BENEFITS

• Lightweight, corrosion resistant polypropylene construction gives you strength without weight
• Comes complete with gauge, wrench and 3/8" drain valve
• Light enough to be portable

Specifications

• Material: Polypropylene
• Colour: Blue with Black Cap
• Port Size: 1"
• Maximum Dimensions: 184mm x 594mm
• Initial ΔP @ Flow Rate: 0.07 bar @ 57 lpm
• Material: Polypropylene
• Seal: EPDM
• Temperature Range (°C): 4.4-38
• Max Pressure (bar): 6.2
• Flow Rate (lpm): 100

Follow the manufacturer’s installation guidance and check all connections before leaving the installation.

Order before our dispatch cut-off — 3pm Monday to Friday, or 12pm on Saturday — and your order is sent the same day; anything after that follows the next working day. We don’t dispatch on Sundays, and you’ll get a tracking link by email as soon as your order is on its way.

Choose your UK delivery option at checkout:

• Free Express Delivery — free on orders over £60 (2–3 working days).
• Standard Delivery — £3.99 (2–3 working days).
• Next Day Delivery — £6.99, arriving the next working day when you order before the cut-off.

We also ship internationally, with rates calculated at checkout.

Returns & refunds

Changed your mind? You have 30 days to return any unused filter in its original sealed packaging for a refund, or 90 days for exchanges. Start at our returns portal and either generate a prepaid Royal Mail label (£3.49, deducted from your refund) or use your own courier — exchanges are always free to return. We approve refunds within 24 hours of your return reaching us; your bank may then take 3–5 working days to show the funds.