Product Introduction
4 Inch Water Pump Foot Valve Strainer - Cast Iron Suction Filter with Flapper Check Valve for Petrol and Electric Water Pumps
4" Bore · Red Painted Cast Iron Body · Slotted Cage Strainer Basket · Integrated Flapper Check Valve · Ribbed Hose Tail Connector - Fits 4-Inch Suction Hose on Agricultural, Irrigation, and Dewatering Water Pumps
Water pump filter 4"
A water pump draws water from an open source - river, pond, irrigation canal, flooded trench, or storage tank - through a suction hose that must be maintained in a primed, water-filled state between operating cycles. Without protection at the submerged end of the suction hose, two failure modes occur simultaneously: debris, silt, leaves, and aquatic material enters the suction line and reaches the pump impeller, causing accelerated wear or blockage of the pump casing and impeller; and when the pump is stopped, the water in the suction hose drains back into the source under gravity, requiring the pump to be re-primed - a time-consuming manual operation on large-bore suction systems - before it can resume flow at the next start cycle.
The 4-inch foot valve strainer addresses both failure modes in a single component fitted to the submerged end of the 4-inch suction hose. The cast iron slotted cage strainer basket surrounding the valve body physically blocks debris and aquatic material from entering the suction line while allowing unrestricted water flow inward through the wide cage slots at the pump's rated flow rate. The integrated flapper check valve inside the body opens freely under the suction pressure of the pump's operating stroke, allows full-bore water flow from source to pump, and closes under gravity and back-pressure when the pump stops - retaining the water column in the suction hose and eliminating manual re-priming at the next start. The red painted cast iron body with flanged mid-section, three mounting bolt holes, and ribbed hose tail connector suits direct installation on 4-inch suction hose via clamp or cam-lock fitting for agricultural irrigation, construction site dewatering, and industrial water transfer pump assemblies.
Technical Profiles & Materials
Red Painted Cast Iron Slotted Cage Strainer Basket The strainer cage is cast from grey cast iron and finished with red enamel paint that provides a serviceable level of corrosion protection in fresh water immersion service, identifying the component visually as a suction-side fitting. The slotted cage design - wide rectangular slots around the circumference and circular apertures on the face - maximises the open area of the strainer relative to its overall projected diameter, ensuring that even as the outer slot surface accumulates a partial debris layer during operation, sufficient free open area remains to sustain the pump's rated flow rate without the suction head loss that starves the impeller and reduces pump output. The cast iron construction resists the physical impact of submerged rocks, gravel, and hard debris that would crack or deform a plastic-bodied strainer, and the cage's substantial wall thickness withstands the mechanical loading of being dragged along a river or canal bed during hose repositioning.
Integrated Flapper Check Valve for Suction Line Prime Retention Inside the cast iron body, a rubber-faced flapper valve disc is hinged at one edge so that it swings open freely under the suction pressure differential created by the running pump - offering minimal resistance to inward water flow - and closes flat against its seat under gravity and the back-pressure of the water column in the suction hose when the pump stops. The flapper check valve retains the water column in the 4-inch suction hose between operating cycles, eliminating the need to manually re-prime the suction line at each pump start - a critical operational advantage for large-bore irrigation and dewatering systems where re-priming requires water introduction through the pump casing, a process that can take several minutes and requires a water supply separate from the source being pumped. Flapper condition - rubber face integrity and hinge freedom - should be verified at each service interval, as a cracked or permanently set flapper that cannot fully close against its seat will allow the suction column to drain and require re-priming regardless of suction hose condition.
Technical Specifications
| ITEM | DETAILS |
| Type | 4-Inch Foot Valve Strainer with Integrated Flapper Check Valve |
| Application | 4-inch suction hose on petrol and electric water pumps; agricultural irrigation, construction site dewatering, pond and canal water transfer, industrial water supply |
| Code | 0901302 |
| Material | Red painted cast iron body and cage; rubber-faced flapper check valve; steel bolt hardware |
| Details explanation | Bore: 4 inch (100mm); slotted cage strainer; integrated flapper check valve; flanged mid-body with 3 bolt holes; ribbed hose tail for 4" suction hose; clamp or cam-lock hose connection |
| Brand Name | SeaSummer |
| Operating Temp | 0°C to 60°C |
| Delivery Time | 30 Days |
| Packaging | Cardboard packaging |
Products Application
Foot Valve Installation on 4-Inch Suction Hose at Water Source
Irrigation technicians and pump operators fit the 4-inch foot valve strainer to the end of the suction hose before lowering it into the water source - threading or clamping the ribbed hose tail into the suction hose and securing with a hose clamp, then lowering the complete hose assembly into the river, canal, or pond until the foot valve is fully submerged at the required depth below the water surface. Correct submersion depth - typically a minimum of 300mm below the water surface - ensures the strainer cage remains covered during draw-down as the water level drops during sustained pumping, preventing air ingestion through the cage top that causes the pump to lose prime mid-operation. Once submerged, the foot valve retains the water column in the suction hose during the pump's start cycle, allowing the pump to begin flow immediately without manual priming.
Strainer Cage Cleaning and Flapper Valve Inspection at Scheduled Service
After each extended pumping session in water sources with high suspended sediment or aquatic vegetation, the foot valve strainer is withdrawn from the water, the suction hose is disconnected, and the cage slots are cleared of accumulated debris using a stiff brush and clean water - restoring the open cage area that determines how much suction head loss the strainer imposes on the pump at rated flow. The flapper valve condition is checked by tilting the foot valve body with the hose tail facing upward and listening for the flapper closing under gravity - a flapper that remains open or closes slowly has a cracked rubber face or a seized hinge that prevents effective prime retention and must be replaced before the next pumping session.
Agricultural Irrigation and Construction Dewatering Pump Operations
On agricultural irrigation systems where a 4-inch petrol water pump draws from a canal or river to supply surface irrigation lines or sprinkler networks, the foot valve strainer performs continuously through multi-hour pumping sessions - preventing the aquatic weed, sediment, and debris common in open irrigation water sources from reaching and blocking the pump impeller casing while retaining prime in the suction line between irrigation cycles. On construction dewatering operations where a pump must clear groundwater or rainwater from a flooded trench or basement excavation, the foot valve strainer protects the pump from the sand, gravel, and construction debris suspended in the water at the trench bottom, where the foot valve must function reliably in the challenging conditions of water-saturated soil, intermittent contact with the trench floor, and variable water levels as the dewatering operation progresses.
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
Trusted Partnership Power
YOUR PROFESSIONAL ONE-STOP SOURCE
FOR 10000+ OUALITY PARTS
Verified Factory Excellence
BACKED BY 200+ TRUSTED FACTORY PARTNERS
Production process
Quality control
Expo experience
Customer Reviews
FAQ
Q: Are you an impartial industrial components dealer or a direct China water pump factors factory?
A:We are a direct, ISO9001-certified engineering water pump components manufacturing facility and precision fluid-control factor manufacture exporter primarily based in China. We function our personal cleanroom injection molding bays, computerized ultrasonic welding arrays, computerized hydraulic stress check stations, and clean-room packaging lines, passing direct-factory wholesale price financial savings straight to your element procurement margins.
Q: Can your manufacturing unit furnish full certification forms for food-contact or consuming water compliance?
A: Yes, absolutely. For food, beverage, or scientific applications, our manufacturing unit makes use of one hundred percent virgin, un-recycled polypropylene resins accompanied by means of fabric traceability certificates. We mechanically furnish B2B purchasers with complete FDA compliance documentation, NSF-grade compound declarations, and RoHS/REACH chemical protection screening sheets to make certain clean clearance thru worldwide customs.
Q: Do you provide customization picks for distinctly corrosive fluids like sturdy acids or ozone?
A: Yes, we are a thoroughly succesful OEM/ODM supplier. For aggressive chemical or ozone environments, we can improve the 12x26.5mm valve configuration in our factory: substituting the general PP housing with top class PVDF (Fluoropolymer) and changing any steel springs with Hastelloy or whole springless gravity-ball architecture, making sure final chemical resistance.
Q: How do we impervious a pattern batch to execute computerized lifecycle and burst-pressure testing?
A: We relatively inspire complete laboratory contrast earlier than logging mass grant agreements. We can ship a pattern lot of 5-10 gadgets of our inventory 12x26.5mm take a look at valves for assessment (setup costs and DHL/FedEx air freight apply). Once the factors pass by your inner lifecycle verification and a formal wholesale quantity manufacturing contract or container run is locked in, the sampling charges are a hundred percent credited returned to your industrial balance.
Hot Tags: water pump filter 4“, China water pump filter 4“ suppliers, 3 Inch Diesel Iron Water Pump
