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Watts-FH4200BL12 Flowmatic Blue Filter Housing 10 in Std With 1/2 in Ports

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Watts-FH4200BL12 Flowmatic Blue Filter Housing 10 in Std With 1/2 in Ports

The Watts FH4200BL12 Flowmatic is a heavy-duty 10-inch standard filter housing engineered with FDA-grade polypropylene, reinforced sidewalls, and buttress threading for residential whole-house filtration. Accepts standard 2.5" x 10" cartridges and handles up to 100 psi with 1/2" NPT ports for reliable, chemical-resistant service.
SPECIFICATIONS

Watts FH4200BL12 Core Specs

Filter Size
10 inch
Standard 2.5" x 10" cartridge
Port Size
1/2" NPT
Inlet and outlet
Max Pressure
100 psi
Residential standard
Material
Polypropylene
FDA grade, chemically resistant
Temperature Range
40–100°F
4–37.8°C operating range
O-Ring Type
EPDM
Cap, sump, and top seat
TECHNICAL DETAILS

Construction & Features

Model Number Watts FH4200BL12
Housing Color Blue sump with black cap
Thread Design Buttress thread for superior sealing and security
Sidewall Construction Thick walls with heavy-duty reinforcing ribs
Chemical Resistance Resists acids, alcohol, ammonia, oils, and plating solutions
Pressure Relief Valve Non-PRV style (no integrated pressure relief)
Mounting Bracket Not included (sold separately)
COMPATIBILITY & APPLICATIONS

Where It Works

The Watts FH4200BL12 Flowmatic housing is designed for residential point-of-entry or point-of-use filtration applications where you need a durable, chemically resistant housing for standard 10-inch cartridges. Compatible with sediment, carbon block, pleated polyester, and specialty cartridges in the 2.5" x 10" format. Common uses include whole-house sediment filtration, chlorine reduction before water softeners, well water pre-filtration, and under-sink systems requiring robust housing. The 1/2" NPT ports fit standard plumbing connections, and the reinforced polypropylene construction makes it suitable for environments with mild chemical exposure or aggressive water chemistry.

💧 Pro Tip: The buttress thread and triple EPDM o-ring design mean fewer leaks over time, but keep a replacement o-ring kit on hand and lubricate threads with silicone grease during cartridge changes to maintain that seal.
The Watts FH4200BL12 Flowmatic is a heavy-duty 10-inch standard filter housing engineered with FDA-grade polypropylene, reinforced sidewalls, and buttress threading for residential whole-house filtration. Accepts standard 2.5" x 10" cartridges and handles up to 100 psi with 1/2" NPT ports for reliable, chemical-resistant service.
SPECIFICATIONS

Watts FH4200BL12 Core Specs

Filter Size
10 inch
Standard 2.5" x 10" cartridge
Port Size
1/2" NPT
Inlet and outlet
Max Pressure
100 psi
Residential standard
Material
Polypropylene
FDA grade, chemically resistant
Temperature Range
40–100°F
4–37.8°C operating range
O-Ring Type
EPDM
Cap, sump, and top seat
TECHNICAL DETAILS

Construction & Features

Model Number Watts FH4200BL12
Housing Color Blue sump with black cap
Thread Design Buttress thread for superior sealing and security
Sidewall Construction Thick walls with heavy-duty reinforcing ribs
Chemical Resistance Resists acids, alcohol, ammonia, oils, and plating solutions
Pressure Relief Valve Non-PRV style (no integrated pressure relief)
Mounting Bracket Not included (sold separately)
COMPATIBILITY & APPLICATIONS

Where It Works

The Watts FH4200BL12 Flowmatic housing is designed for residential point-of-entry or point-of-use filtration applications where you need a durable, chemically resistant housing for standard 10-inch cartridges. Compatible with sediment, carbon block, pleated polyester, and specialty cartridges in the 2.5" x 10" format. Common uses include whole-house sediment filtration, chlorine reduction before water softeners, well water pre-filtration, and under-sink systems requiring robust housing. The 1/2" NPT ports fit standard plumbing connections, and the reinforced polypropylene construction makes it suitable for environments with mild chemical exposure or aggressive water chemistry.

💧 Pro Tip: The buttress thread and triple EPDM o-ring design mean fewer leaks over time, but keep a replacement o-ring kit on hand and lubricate threads with silicone grease during cartridge changes to maintain that seal.
$9.61

Original: $27.46

-65%
Watts-FH4200BL12 Flowmatic Blue Filter Housing 10 in Std With 1/2 in Ports

$27.46

$9.61

Description

The Watts FH4200BL12 Flowmatic is a heavy-duty 10-inch standard filter housing engineered with FDA-grade polypropylene, reinforced sidewalls, and buttress threading for residential whole-house filtration. Accepts standard 2.5" x 10" cartridges and handles up to 100 psi with 1/2" NPT ports for reliable, chemical-resistant service.
SPECIFICATIONS

Watts FH4200BL12 Core Specs

Filter Size
10 inch
Standard 2.5" x 10" cartridge
Port Size
1/2" NPT
Inlet and outlet
Max Pressure
100 psi
Residential standard
Material
Polypropylene
FDA grade, chemically resistant
Temperature Range
40–100°F
4–37.8°C operating range
O-Ring Type
EPDM
Cap, sump, and top seat
TECHNICAL DETAILS

Construction & Features

Model Number Watts FH4200BL12
Housing Color Blue sump with black cap
Thread Design Buttress thread for superior sealing and security
Sidewall Construction Thick walls with heavy-duty reinforcing ribs
Chemical Resistance Resists acids, alcohol, ammonia, oils, and plating solutions
Pressure Relief Valve Non-PRV style (no integrated pressure relief)
Mounting Bracket Not included (sold separately)
COMPATIBILITY & APPLICATIONS

Where It Works

The Watts FH4200BL12 Flowmatic housing is designed for residential point-of-entry or point-of-use filtration applications where you need a durable, chemically resistant housing for standard 10-inch cartridges. Compatible with sediment, carbon block, pleated polyester, and specialty cartridges in the 2.5" x 10" format. Common uses include whole-house sediment filtration, chlorine reduction before water softeners, well water pre-filtration, and under-sink systems requiring robust housing. The 1/2" NPT ports fit standard plumbing connections, and the reinforced polypropylene construction makes it suitable for environments with mild chemical exposure or aggressive water chemistry.

💧 Pro Tip: The buttress thread and triple EPDM o-ring design mean fewer leaks over time, but keep a replacement o-ring kit on hand and lubricate threads with silicone grease during cartridge changes to maintain that seal.
Watts-FH4200BL12 Flowmatic Blue Filter Housing 10 in Std With 1/2 in Ports | Isopure Water