The US Water Systems Inc Calcite Replacement Cartridge 4.5 x 20 (USWF-4520-PH-OR) features a Double O-Ring Seal for added security, neutralizing acidic water for safe and clean drinking water. The filter cartridge is blue with black ends and labeled Made in America.
Close-up of a US Water Systems Calcite Replacement Cartridge by US Water Systems Inc, featuring a blue cylindrical container with a black threaded cap for effective performance, model USWF-4520-PH-OR, size 4.5 x 20, and equipped with a double O-ring seal.
The US Water Systems Calcite Replacement Cartridge 4.5 x 20 (USWF-4520-PH-OR) features a black plastic lid embossed with THIS END UP TO CAP OUTLET and MADE IN USA. Designed to neutralize acidic water efficiently, it includes a Double O-Ring Seal for enhanced performance in its circular design.
The US Water Systems Inc Calcite Replacement Cartridge 4.5 x 20 (USWF-4520-PH-OR) features a Double O-Ring Seal for added security, neutralizing acidic water for safe and clean drinking water. The filter cartridge is blue with black ends and labeled Made in America.
Close-up of a US Water Systems Calcite Replacement Cartridge by US Water Systems Inc, featuring a blue cylindrical container with a black threaded cap for effective performance, model USWF-4520-PH-OR, size 4.5 x 20, and equipped with a double O-ring seal.
The US Water Systems Calcite Replacement Cartridge 4.5 x 20 (USWF-4520-PH-OR) features a black plastic lid embossed with THIS END UP TO CAP OUTLET and MADE IN USA. Designed to neutralize acidic water efficiently, it includes a Double O-Ring Seal for enhanced performance in its circular design.

US Water Systems Calcite Replacement Cartridge 4.5" x 20" Double O-Ring Seal | USWF-4520-PH-OR

List Price: Factory Direct Price: SALE PRICE:
$183.25 $122.17
$109.95
$109.95
40% OFF FACTORY DIRECT SAVINGS
SKU: 507-USWF-4520-PH-OR
4.5" x 20" Calcite cartridge is used to neutralize acidic water (raising the pH), reducing the leaching of metal plumbing components, and for use post RO to raise TDS, in case the plumbing is copper and leaching of the copper is an issue.
Subtotal: $109.95

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The US Water Systems Inc Calcite Replacement Cartridge 4.5 x 20 (USWF-4520-PH-OR) features a Double O-Ring Seal for added security, neutralizing acidic water for safe and clean drinking water. The filter cartridge is blue with black ends and labeled Made in America.

US Water Systems Calcite Replacement Cartridge 4.5" x 20" Double O-Ring Seal | USWF-4520-PH-OR

$200.11 $109.95
The US Water Systems Inc Calcite Replacement Cartridge 4.5 x 20 (USWF-4520-PH-OR) features a Double O-Ring Seal for added security, neutralizing acidic water for safe and clean drinking water. The filter cartridge is blue with black ends and labeled Made in America.
Close-up of a US Water Systems Calcite Replacement Cartridge by US Water Systems Inc, featuring a blue cylindrical container with a black threaded cap for effective performance, model USWF-4520-PH-OR, size 4.5 x 20, and equipped with a double O-ring seal.
The US Water Systems Calcite Replacement Cartridge 4.5 x 20 (USWF-4520-PH-OR) features a black plastic lid embossed with THIS END UP TO CAP OUTLET and MADE IN USA. Designed to neutralize acidic water efficiently, it includes a Double O-Ring Seal for enhanced performance in its circular design.

US Water Systems Calcite Replacement Cartridge 4.5" x 20" Double O-Ring Seal | USWF-4520-PH-OR

$200.11 $109.95
Product Overview

US Water Systems Calcite Replacement Cartridge 4.5" x 20" Double O-Ring Seal | USWF-4520-PH-OR

4.5" x 20" Calcite cartridge is used to neutralize acidic water (raising the pH), reducing the leaching of metal plumbing components, and for use post RO to raise TDS, in case the plumbing is copper and leaching of the copper is an issue.

Capacity: 24,000 Gallons

Flow Rate: Up to 4.0 GPM

Double O-Ring seal prevents bypass for 100% filtration

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