
Grundfos 99880243 Flange Gasket
The Grundfos 99880243 Flange Gasket is a critical replacement component engineered to maintain a leak-proof seal for your hydronic circulation systems. This genuine Grundfos flange gasket 2-pack is specifically designed for the Grundfos UP43-75 pump series, featuring a square-cut profile that ensures a high-integrity connection between the pump body and the 1-1/2 inch flange. Unlike standard round O-rings, these "donut" style HVAC pump gaskets are fabricated from professional-grade EPDM, providing exceptional resistance to heat, chemicals, and mechanical compression within closed-loop heating or cooling applications.
For contractors performing routine maintenance or emergency repairs, these replacement pump gaskets provide the exact dimensional tolerances required to prevent system pressure loss and bypass. Using the correct sealing flange 99880243 is vital for preventing the common "weeping" leaks associated with mismatched or generic hardware. These components are essential for a professional Grundfos UP43-75 maintenance kit, ensuring your pump operates at peak efficiency without the risk of fluid escape at the mounting interface.
Key Benefits for Technicians:
- Precision Fit: Engineered specifically as a square cut gasket for Grundfos GF 40/43 series flanges.
- Durable Sealing: High-density material resists degradation from continuous exposure to glycol or treated water.
- Dual-Pack Economy: Includes two gaskets to service both the inlet and outlet of a single pump assembly.
- Compatibility: Replaces legacy part number 00530244, ensuring seamless integration with existing 1.5-inch pump flanges.
Common Questions:
Are these gaskets compatible with other pump brands like Taco or B&G?
While many 1-1/2 inch flanges share similar bolt patterns, the 99880243 is optimized for Grundfos UP43-75 series pump housings. Always verify the gasket seat depth on the pump volute before substituting for other manufacturers.
Why should I use square-cut gaskets instead of round O-rings?
Square-cut gaskets provide a larger surface area for compression between the pump and the flange, which is necessary for the flat-mating surfaces found on high-head circulators like the UP43-75.
How often should these gaskets be replaced?
Technicians should replace the pump flange gaskets every time the pump is pulled for service or if there are signs of crystallization around the flange edges, indicating a slow leak.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Grundfos 99880243 Flange Gasket
The Grundfos 99880243 Flange Gasket is a critical replacement component engineered to maintain a leak-proof seal for your hydronic circulation systems. This genuine Grundfos flange gasket 2-pack is specifically designed for the Grundfos UP43-75 pump series, featuring a square-cut profile that ensures a high-integrity connection between the pump body and the 1-1/2 inch flange. Unlike standard round O-rings, these "donut" style HVAC pump gaskets are fabricated from professional-grade EPDM, providing exceptional resistance to heat, chemicals, and mechanical compression within closed-loop heating or cooling applications.
For contractors performing routine maintenance or emergency repairs, these replacement pump gaskets provide the exact dimensional tolerances required to prevent system pressure loss and bypass. Using the correct sealing flange 99880243 is vital for preventing the common "weeping" leaks associated with mismatched or generic hardware. These components are essential for a professional Grundfos UP43-75 maintenance kit, ensuring your pump operates at peak efficiency without the risk of fluid escape at the mounting interface.
Key Benefits for Technicians:
- Precision Fit: Engineered specifically as a square cut gasket for Grundfos GF 40/43 series flanges.
- Durable Sealing: High-density material resists degradation from continuous exposure to glycol or treated water.
- Dual-Pack Economy: Includes two gaskets to service both the inlet and outlet of a single pump assembly.
- Compatibility: Replaces legacy part number 00530244, ensuring seamless integration with existing 1.5-inch pump flanges.
Common Questions:
Are these gaskets compatible with other pump brands like Taco or B&G?
While many 1-1/2 inch flanges share similar bolt patterns, the 99880243 is optimized for Grundfos UP43-75 series pump housings. Always verify the gasket seat depth on the pump volute before substituting for other manufacturers.
Why should I use square-cut gaskets instead of round O-rings?
Square-cut gaskets provide a larger surface area for compression between the pump and the flange, which is necessary for the flat-mating surfaces found on high-head circulators like the UP43-75.
How often should these gaskets be replaced?
Technicians should replace the pump flange gaskets every time the pump is pulled for service or if there are signs of crystallization around the flange edges, indicating a slow leak.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Grundfos 99880243 Flange Gasket is a critical replacement component engineered to maintain a leak-proof seal for your hydronic circulation systems. This genuine Grundfos flange gasket 2-pack is specifically designed for the Grundfos UP43-75 pump series, featuring a square-cut profile that ensures a high-integrity connection between the pump body and the 1-1/2 inch flange. Unlike standard round O-rings, these "donut" style HVAC pump gaskets are fabricated from professional-grade EPDM, providing exceptional resistance to heat, chemicals, and mechanical compression within closed-loop heating or cooling applications.
For contractors performing routine maintenance or emergency repairs, these replacement pump gaskets provide the exact dimensional tolerances required to prevent system pressure loss and bypass. Using the correct sealing flange 99880243 is vital for preventing the common "weeping" leaks associated with mismatched or generic hardware. These components are essential for a professional Grundfos UP43-75 maintenance kit, ensuring your pump operates at peak efficiency without the risk of fluid escape at the mounting interface.
Key Benefits for Technicians:
- Precision Fit: Engineered specifically as a square cut gasket for Grundfos GF 40/43 series flanges.
- Durable Sealing: High-density material resists degradation from continuous exposure to glycol or treated water.
- Dual-Pack Economy: Includes two gaskets to service both the inlet and outlet of a single pump assembly.
- Compatibility: Replaces legacy part number 00530244, ensuring seamless integration with existing 1.5-inch pump flanges.
Common Questions:
Are these gaskets compatible with other pump brands like Taco or B&G?
While many 1-1/2 inch flanges share similar bolt patterns, the 99880243 is optimized for Grundfos UP43-75 series pump housings. Always verify the gasket seat depth on the pump volute before substituting for other manufacturers.
Why should I use square-cut gaskets instead of round O-rings?
Square-cut gaskets provide a larger surface area for compression between the pump and the flange, which is necessary for the flat-mating surfaces found on high-head circulators like the UP43-75.
How often should these gaskets be replaced?
Technicians should replace the pump flange gaskets every time the pump is pulled for service or if there are signs of crystallization around the flange edges, indicating a slow leak.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












