Sump Pump Check Valve - 1¼" or 1½" Full Flow with Rubber Couplings

SKU: CSSP-CV

36 in stock

(0)

$20.00

Estimated standard delivery between January 06 and January 09. Order within . Upgrade for faster delivery at checkout.

  • Size Options: 1¼" or 1½" (slip x slip)
  • Design: Full-flow internal flapper
  • Maximum Rating: 25 PSI (58 feet of head)
  • Operating Rating: 4.3 PSI (10 feet of head) at 130°F
  • Installation Orientation: Vertical or horizontal
  • Connection Type: Rubber coupling or solvent weld
  • Body Material: PVC plastic (ultrasonically welded)
  • Flapper Material: Neoprene with stainless steel backing
  • Gasket: Neoprene
  • Hardware: Stainless steel rivet, stainless steel clamps
  • Color: Green
  • Pipe Compatibility: SCH40 PVC
  • Features: Reduces water hammer, full-flow design
  • Warranty: 1-year limited (Zoeller Pump Company)
  • Full-flow check valve body
  • Two rubber couplings with stainless steel clamps
  • Installation instructions
  • 1-year limited warranty from Zoeller Pump Company

We want you to be happy with your product!

Within 30 days of your order, we offer a 100% refund if a product was faulty, defective, or damaged in shipping and replacement is not feasible. While extremely rare, if we make a mistake we will also refund or replace the item.

New, unopened standard products may be returned within 30 days of delivery for a refund.

Restocking fees apply on opened boxes. Customer is responsible for return shipping costs for preferential returns.

Sump Pump Check Valve - 1¼" or 1½" Full Flow with Rubber Couplings

Sump Pump Check Valve - 1¼" or 1½" Full Flow with Rubber Couplings

$20.00

$20.00

Prevents Backflow

Internal flapper closes immediately when pump stops, holding discharged water in the line—eliminates pump short-cycling and extends equipment life.

Reduced Water Hammer

Engineered flapper design controls closure rate to cushion hydraulic shock—protects pump, fittings, and discharge piping from destructive pressure spikes.

Full Flow Design

Flapper opens to match full pipe diameter for unrestricted flow—if your pump can pass a solid, this valve handles it without clogging or back pressure.

Easy Installation

Rubber couplings with stainless steel clamps connect to SCH40 PVC in minutes—no solvent welding required, installs vertically or horizontally.

Sump Pump Check Valve - 1¼" or 1½" Full Flow with Rubber Couplings

Backflow Prevention

This full-flow check valve prevents discharged water from flowing back into your sump pump basin, protecting your pump from unnecessary cycling and water hammer damage. Designed specifically for basement and crawl space sump pump applications, this valve features rubber couplings with stainless steel clamps for quick installation on SCH40 PVC discharge lines, plus a full-flow design that matches your pipe's internal diameter for unrestricted flow.

Professional Performance Specifications

Rated for 25 PSI (58 feet of head) maximum and 4.3 PSI (10 feet of head) at 130°F operating temperature. This performance range covers typical residential sump pump applications with adequate safety margin. The valve handles the discharge pressure from pumps like the Zoeller M53 without restriction or failure.

Why You Need a Check Valve: Every sump pump installation should include a check valve. Without one, water flows back into the basin after each pump cycle, causing the pump to run more frequently, wasting energy, creating excessive wear, and potentially allowing the basin to overflow during high-water events. The small investment in a check valve provides significant long-term protection for your pump investment.