Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
APOLLO 1 in FNPT x FNPT Potable Water Dual Check Backflow Preventer - Potable Water Dual Check Backflow Preventers
APOLLOPotable Water Dual Check Backflow Preventers

APOLLO 1 in FNPT x FNPT Potable Water Dual Check Backflow Preventer

<p>The APOLLO 1 in FNPT x FNPT Potable Water Dual Check Backflow Preventer (MPN: 4ALF3A55A) is a compact, reliable solution for protecting potable water systems. With a flow rate of 24 gpm and EPDM seals, it is…

SKU 3G-OTH-437186

Brand
APOLLO
Item
1 in FNPT x FNPT Potable Water Dual Check Backflow Preventer
Part Number
4ALF3A55A
Category
Potable Water Dual Check Backflow Preventers
Available to Order
Also known as:4ALF3A55AAPOLLO
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 — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

APOLLO
Manufacturer Part Number
4ALF3A55A
Type
FNPT x FNPT, EPDM
Overall Lg
4.38 in
Pipe Size
1 in
Flow Rate
24 gpm
Connection Type
FNPT x FNPT

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

<p>The APOLLO 1 in FNPT x FNPT Potable Water Dual Check Backflow Preventer (MPN: 4ALF3A55A) is a compact, reliable solution for protecting potable water systems. With a flow rate of 24 gpm and EPDM seals, it is designed for durability in various applications. This 1-inch dual check valve features FNPT connections for easy installation.</p><p>Ideal for commercial and industrial plumbing, this backflow preventer ensures compliance with backflow prevention requirements. As a Singapore-based supplier, 3G Electric offers SGD quotes on request, handles GST for local buyers, and provides fast delivery across Singapore and Southeast Asia.</p>

Frequently Asked Questions

What are the key specifications of this APOLLO backflow preventer?

This APOLLO dual check backflow preventer has a 1-inch FNPT x FNPT connection, a flow rate of 24 gpm, and EPDM seals. Its overall length is 4.38 inches, and the manufacturer part number is 4ALF3A55A.

Can I get a quote in SGD and what about GST and delivery?

Yes, 3G Electric provides quotes in SGD upon request. For Singapore buyers, GST is handled. We offer fast delivery across Singapore and Southeast Asia.

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.
Not sure this is the right part? Photo-identify it

APOLLO Products

3G Electric supplies APOLLO potable water dual check 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

More from APOLLO

View all APOLLO parts

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first