Flojet 4000 Series Demand Pump – 12V (R4300-143A)

Product Overview

The Flojet 4000 Series Demand Pump – R4300-143A was a durable and efficient 12V diaphragm pump, designed for spraying, liquid transfer, and dispensing tasks. With a 3.1 Bar switch setting and a 16.3 L/min maximum flow rate, it provided reliable performance in agricultural, marine, and industrial applications.

⚠️ Discontinued Notice: As of May 2025, this model is no longer in production. Flojet has transitioned the Quad/4000 Series to the improved Versijet 4-Chamber Pump Series, which features the same mounting footprint and port sizes for easy replacement.

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Key Features (4000 Series – R4300-143A)

✅ 3.1 Bar switch setting
✅ 16.3 L/min maximum flow
✅ 12V DC, 13.0 Amps
✅ Santoprene diaphragm & EPDM check valve
✅ 3/4" hose barb ports
✅ Polypropylene pump housing
✅ Self-priming up to 2.4m
✅ Thermal overload protection
✅ Max fluid temperature: 54°C

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Recommended Replacement: Flojet Versijet 4-Chamber Pump – 12V (Q451F-118S-2P)

Product Overview

The Flojet Versijet Q451F-118S-2P is the direct replacement for the discontinued R4300-143A. With an upgraded 4.1 Bar switch setting, 17.1 L/min maximum flow, and internal bypass, the Versijet offers enhanced performance, smoother operation, and longer service life.

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Key Features (Versijet – Q451F-118S-2P)

✅ 4.1 Bar switch setting with internal bypass
✅ 17.1 L/min maximum flow
✅ 12V DC, 14 Amps
✅ Santoprene diaphragm & EPDM check valve
✅ Quick Connect 3/4" hose barb ports
✅ Glass-filled polypropylene housing
✅ Self-priming up to 2.4m
✅ Runs dry without damage
✅ Heavy-duty coated motor with long-life diaphragm
✅ Operating temperature range: 4–60°C

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Why Upgrade to Versijet?

The Flojet Versijet Series is designed as a direct-fit replacement for older 4000 Series pumps, ensuring simple installation. With its higher efficiency, smoother flow, and durable construction, the Versijet is the best choice for maintaining or upgrading your pump system.

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Order Now

Replace your discontinued Flojet 4000 Series R4300-143A with the Flojet Versijet Q451F-118S-2P today.