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Watts - HD4500 - Flowmatic 10" Full Flow Black Blue Heavy Duty Housing 3/4" NPT

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Watts - HD4500 - Flowmatic 10" Full Flow Black Blue Heavy Duty Housing 3/4" NPT

The Watts HD4500 Flowmatic delivers industrial-grade filtration in a 10-inch Big Blue housing built for high-flow residential and light commercial applications. Engineered with reinforced ribs and FDA-grade polypropylene, this 3/4" NPT housing handles up to 100 psi while resisting acids, oils, and aggressive chemicals that would degrade lesser housings.
SPECIFICATIONS

Watts HD4500 Technical Details

Model Number HD4500 Flowmatic
Housing Size 10" x 4.5" (Big Blue)
Cartridge Compatibility 2.5" x 10" standard cartridges
Port Connection 3/4" NPT inlet/outlet
Maximum Pressure 100 psi
Temperature Range 40°F to 100°F (4°C to 37.8°C)
Material FDA-grade polypropylene with EPDM o-rings
Features Pressure relief valve, buttress threads, reinforced ribs
INSTALLATION & USE

Setting Up Your HD4500 Housing

  1. Install the housing vertically on a wall or bracket using the mounting bracket holes, ensuring inlet is at the top and outlet at the bottom for proper flow direction.
  2. Apply thread sealant tape to 3/4" NPT ports and connect to your water line, torquing connections to manufacturer specifications without over-tightening.
  3. Insert your chosen 2.5" x 10" filter cartridge into the sump, lubricate the o-rings with food-grade silicone, and hand-tighten the cap using the buttress threads until snug.
  4. Open the pressure relief valve, slowly pressurize the system, then close the valve once water flows steadily and all air is purged from the housing.
COMPATIBILITY

Filter Cartridge Options

The Watts HD4500 accepts all standard 2.5" diameter x 10" length filter cartridges from brands including Kemflo, Pentek, Hydronix, and Culligan. Pair with sediment cartridges (1-50 micron) for well water pre-filtration, carbon block filters for chlorine and taste reduction, or specialty media cartridges for iron, sulfur, or chemical removal. The full-flow design and 3/4" NPT ports support flow rates up to 10 GPM depending on cartridge selection, making this housing suitable for whole-house point-of-entry applications or high-demand point-of-use installations.

🔧 Pro Tip: Always depressurize the housing using the built-in pressure relief valve before attempting to unscrew the sump for cartridge changes. This prevents the sump from ejecting under pressure and makes removal significantly easier while protecting the buttress threads from cross-threading damage.
The Watts HD4500 Flowmatic delivers industrial-grade filtration in a 10-inch Big Blue housing built for high-flow residential and light commercial applications. Engineered with reinforced ribs and FDA-grade polypropylene, this 3/4" NPT housing handles up to 100 psi while resisting acids, oils, and aggressive chemicals that would degrade lesser housings.
SPECIFICATIONS

Watts HD4500 Technical Details

Model Number HD4500 Flowmatic
Housing Size 10" x 4.5" (Big Blue)
Cartridge Compatibility 2.5" x 10" standard cartridges
Port Connection 3/4" NPT inlet/outlet
Maximum Pressure 100 psi
Temperature Range 40°F to 100°F (4°C to 37.8°C)
Material FDA-grade polypropylene with EPDM o-rings
Features Pressure relief valve, buttress threads, reinforced ribs
INSTALLATION & USE

Setting Up Your HD4500 Housing

  1. Install the housing vertically on a wall or bracket using the mounting bracket holes, ensuring inlet is at the top and outlet at the bottom for proper flow direction.
  2. Apply thread sealant tape to 3/4" NPT ports and connect to your water line, torquing connections to manufacturer specifications without over-tightening.
  3. Insert your chosen 2.5" x 10" filter cartridge into the sump, lubricate the o-rings with food-grade silicone, and hand-tighten the cap using the buttress threads until snug.
  4. Open the pressure relief valve, slowly pressurize the system, then close the valve once water flows steadily and all air is purged from the housing.
COMPATIBILITY

Filter Cartridge Options

The Watts HD4500 accepts all standard 2.5" diameter x 10" length filter cartridges from brands including Kemflo, Pentek, Hydronix, and Culligan. Pair with sediment cartridges (1-50 micron) for well water pre-filtration, carbon block filters for chlorine and taste reduction, or specialty media cartridges for iron, sulfur, or chemical removal. The full-flow design and 3/4" NPT ports support flow rates up to 10 GPM depending on cartridge selection, making this housing suitable for whole-house point-of-entry applications or high-demand point-of-use installations.

🔧 Pro Tip: Always depressurize the housing using the built-in pressure relief valve before attempting to unscrew the sump for cartridge changes. This prevents the sump from ejecting under pressure and makes removal significantly easier while protecting the buttress threads from cross-threading damage.
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From $51.62
Watts - HD4500 - Flowmatic 10" Full Flow Black Blue Heavy Duty Housing 3/4" NPT—
$51.62

Description

The Watts HD4500 Flowmatic delivers industrial-grade filtration in a 10-inch Big Blue housing built for high-flow residential and light commercial applications. Engineered with reinforced ribs and FDA-grade polypropylene, this 3/4" NPT housing handles up to 100 psi while resisting acids, oils, and aggressive chemicals that would degrade lesser housings.
SPECIFICATIONS

Watts HD4500 Technical Details

Model Number HD4500 Flowmatic
Housing Size 10" x 4.5" (Big Blue)
Cartridge Compatibility 2.5" x 10" standard cartridges
Port Connection 3/4" NPT inlet/outlet
Maximum Pressure 100 psi
Temperature Range 40°F to 100°F (4°C to 37.8°C)
Material FDA-grade polypropylene with EPDM o-rings
Features Pressure relief valve, buttress threads, reinforced ribs
INSTALLATION & USE

Setting Up Your HD4500 Housing

  1. Install the housing vertically on a wall or bracket using the mounting bracket holes, ensuring inlet is at the top and outlet at the bottom for proper flow direction.
  2. Apply thread sealant tape to 3/4" NPT ports and connect to your water line, torquing connections to manufacturer specifications without over-tightening.
  3. Insert your chosen 2.5" x 10" filter cartridge into the sump, lubricate the o-rings with food-grade silicone, and hand-tighten the cap using the buttress threads until snug.
  4. Open the pressure relief valve, slowly pressurize the system, then close the valve once water flows steadily and all air is purged from the housing.
COMPATIBILITY

Filter Cartridge Options

The Watts HD4500 accepts all standard 2.5" diameter x 10" length filter cartridges from brands including Kemflo, Pentek, Hydronix, and Culligan. Pair with sediment cartridges (1-50 micron) for well water pre-filtration, carbon block filters for chlorine and taste reduction, or specialty media cartridges for iron, sulfur, or chemical removal. The full-flow design and 3/4" NPT ports support flow rates up to 10 GPM depending on cartridge selection, making this housing suitable for whole-house point-of-entry applications or high-demand point-of-use installations.

🔧 Pro Tip: Always depressurize the housing using the built-in pressure relief valve before attempting to unscrew the sump for cartridge changes. This prevents the sump from ejecting under pressure and makes removal significantly easier while protecting the buttress threads from cross-threading damage.
Watts - HD4500 - Flowmatic 10" Full Flow Black Blue Heavy Duty Housing 3/4" NPT | Isopure Water