We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

APOLLO Backflow: Check Valve Repair Kit, 2 1/2 in to 6 in Compatible Valve Size - Repair Kits & Parts for Apollo Backflow Preventers
APOLLORepair Kits & Parts for Apollo Backflow Preventers

APOLLO Backflow: Check Valve Repair Kit, 2 1/2 in to 6 in Compatible Valve Size

The APOLLO Backflow: Check Valve Repair Kit (SKU 3G-OTH-434319, MPN 4S00901) is a repair kit for Apollo backflow preventers, compatible with valve sizes from 2-1/2 in to 6 in. It is designed for use with the 4SG…

SKU 3G-OTH-434319

Brand
APOLLO
Item
Backflow: Check Valve Repair Kit, 2 1/2 in to 6 in Compatible Valve Size
Category
Repair Kits & Parts for Apollo Backflow Preventers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

APOLLO
Manufacturer Part Number
4S00901
Type
Repair Kit
Compatible Valve Size
2-1/2 in to 6 in
Compatible with Mfr. Model No.
4SG Series 2-1/2 In to 6 in

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

APOLLO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The APOLLO Backflow: Check Valve Repair Kit (SKU 3G-OTH-434319, MPN 4S00901) is a repair kit for Apollo backflow preventers, compatible with valve sizes from 2-1/2 in to 6 in. It is designed for use with the 4SG Series in sizes 2-1/2 in to 6 in.

Frequently Asked Questions

What is the APOLLO Backflow Check Valve Repair Kit used for?

The APOLLO Backflow Check Valve Repair Kit (MPN 4S00901) is used to service and restore check valves in Apollo backflow preventers. It is designed for the 4SG Series in sizes 2-1/2 in to 6 in, helping maintain backflow protection in commercial and industrial water systems.

What are the specifications of the APOLLO Backflow Check Valve Repair Kit?

The APOLLO Backflow Check Valve Repair Kit (SKU 804R78, MPN 4S00901) is a repair kit compatible with valve sizes from 2-1/2 in to 6 in. It is designed for use with Apollo 4SG Series backflow preventers in those sizes. The kit includes components to replace worn check valve parts.

Where to buy the APOLLO Backflow Check Valve Repair Kit worldwide?

You can source the APOLLO Backflow Check Valve Repair Kit (MPN 4S00901) through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring the repair kit reaches your facility reliably.

How to install the APOLLO Backflow Check Valve Repair Kit?

To install the APOLLO Backflow Check Valve Repair Kit, first isolate the backflow preventer and relieve system pressure. Disassemble the valve body to access the check valve assembly, remove old components, and install the new kit parts per Apollo's instructions. Reassemble and test for proper sealing and backflow protection.

Used in

Common applications for APOLLO
Water supply systems — APOLLO double check valve backflow preventers (Series 4A) for backflow protection in commercial buildings.
HVAC piping — APOLLO bronze ball valves (two-piece, FNPT) for shut-off and isolation in heating and cooling loops.
Irrigation networks — APOLLO double check valve assemblies (bronze, FNPT) to prevent contamination of potable water sources.
Process piping — APOLLO three-piece ball valves (full-port, sweat connections) for maintenance-friendly flow control in industrial lines.
Safety systems — APOLLO spring-return lever ball valves (bronze, FNPT) for fail-safe shut-off in fuel or gas applications.
Plumbing repairs — APOLLO repair kits (complete check kits) for servicing backflow preventers in existing installations.

APOLLO Products

3G Electric supplies APOLLO repair kits & parts for apollo backflow preventers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
APOLLO Backflow: Rubber Repair Kit, 2 1/2 in to 6 in Compatible Valve Size, Repair Kit (MPN 4S00902)
APOLLO
APOLLO Backflow: Rubber Repair Kit, 2 1/2 in to 6 in Compatible Valve Size, Repair Kit (MPN 4S00902)
APOLLO Backflow: Backflow Preventer Repair Kit, 1⁄2 in Compatible Valve Size, 4S103A2F, Repair Kit (MPN 4S00301)
APOLLO
APOLLO Backflow: Backflow Preventer Repair Kit, 1⁄2 in Compatible Valve Size, 4S103A2F, Repair Kit (MPN 4S00301)
APOLLO Backflow: Check Repair Kit, 3/4 in to 1 in Compatible Valve Size, Repair Kit, 40 (MPN 40004A2)
APOLLO
APOLLO Backflow: Check Repair Kit, 3/4 in to 1 in Compatible Valve Size, Repair Kit, 40 (MPN 40004A2)
APOLLO Backflow: Major Repair Kit, 3/4 in to 1 in Compatible Valve Size, 40204T2/40205T2, Repair Kit (MPN 40004A1)
APOLLO
APOLLO Backflow: Major Repair Kit, 3/4 in to 1 in Compatible Valve Size, 40204T2/40205T2, Repair Kit (MPN 40004A1)
APOLLO Backflow: Complete Relief Valve Repair Kit, 2 1/2 in to 6 in Compatible Valve Size (MPN 4A00C05)
APOLLO
APOLLO Backflow: Complete Relief Valve Repair Kit, 2 1/2 in to 6 in Compatible Valve Size (MPN 4A00C05)
APOLLO Backflow: Check Repair Kit, 1 1/4 in to 2 in Compatible Valve Size, 4ALF206A2F/4ALF207A2F (MPN 40007A2)
APOLLO
APOLLO Backflow: Check Repair Kit, 1 1/4 in to 2 in Compatible Valve Size, 4ALF206A2F/4ALF207A2F (MPN 40007A2)

More from APOLLO

View all APOLLO parts
APOLLO Backflow: Complete Rubber Repair Kit, 1 in Compatible Valve Size, 4ALF208A2F, Repair Kit (MPN 4A00501)
APOLLO
APOLLO Backflow: Complete Rubber Repair Kit, 1 in Compatible Valve Size, 4ALF208A2F, Repair Kit (MPN 4A00501)
APOLLO Backflow: Complete Relief Valve Kit, 2 in Compatible Valve Size, 4ALF208A2F, Repair Kit (MPN 4A00805)
APOLLO
APOLLO Backflow: Complete Relief Valve Kit, 2 in Compatible Valve Size, 4ALF208A2F, Repair Kit (MPN 4A00805)
APOLLO Backflow: Major Repair Kit, 1 1/4 in to 2 in Compatible Valve Size, 20208T2/40206T2/40207T2 (MPN 40007A1)
APOLLO
APOLLO Backflow: Major Repair Kit, 1 1/4 in to 2 in Compatible Valve Size, 20208T2/40206T2/40207T2 (MPN 40007A1)
APOLLO Backflow: Complete Repair Kit, 3⁄4 in Compatible Valve Size, 4ALF204A2F, Repair Kit (MPN 4A00403)
APOLLO
APOLLO Backflow: Complete Repair Kit, 3⁄4 in Compatible Valve Size, 4ALF204A2F, Repair Kit (MPN 4A00403)
APOLLO Second Check Repair Kit: Second Check Repair Kit, 3⁄4 in Compatible Valve Size, 4ALF204A2F (MPN 4A00402)
APOLLO
APOLLO Second Check Repair Kit: Second Check Repair Kit, 3⁄4 in Compatible Valve Size, 4ALF204A2F (MPN 4A00402)
APOLLO Backflow: Major Repair Kit, 3/4 in to 1 in Compatible Valve Size, 40104T2/40105T2, Repair Kit (MPN 40004A5)
APOLLO
APOLLO Backflow: Major Repair Kit, 3/4 in to 1 in Compatible Valve Size, 40104T2/40105T2, Repair Kit (MPN 40004A5)
APOLLO Backflow: Complete Internals Repair Kit, 1 1/2 in/1-1/4 IN Compatible Valve Size, 4ALF-207A2F (MPN 4A00710)
APOLLO
APOLLO Backflow: Complete Internals Repair Kit, 1 1/2 in/1-1/4 IN Compatible Valve Size, 4ALF-207A2F (MPN 4A00710)
APOLLO Backflow: Complete Relief Valve Kit, 1/2 in to 1 in Compatible Valve Size, Repair Kit (MPN 4A00505)
APOLLO
APOLLO Backflow: Complete Relief Valve Kit, 1/2 in to 1 in Compatible Valve Size, Repair Kit (MPN 4A00505)