--- product_id: 67665754 title: "Electronic Servo Controlled Bypass Heater Valve Kit fits 5/8\" Heater Hose #50-1555" brand: "old air products" price: "£142.60" currency: GBP in_stock: true reviews_count: 8 category: "Old Air Products" url: https://www.desertcart.co.uk/products/67665754-electronic-servo-controlled-bypass-heater-valve-kit-fits-5-8 store_origin: GB region: United Kingdom --- # Infinitely adjustable temperature regulation High torque servo motor for precise control Proudly made in the USA Electronic Servo Controlled Bypass Heater Valve Kit fits 5/8" Heater Hose #50-1555 **Brand:** old air products **Price:** £142.60 **Availability:** ✅ In Stock ## Summary > 🔥 Take control of your ride’s climate like a pro! ⚙️ ## Quick Answers - **What is this?** Electronic Servo Controlled Bypass Heater Valve Kit fits 5/8" Heater Hose #50-1555 by old air products - **How much does it cost?** £142.60 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/67665754-electronic-servo-controlled-bypass-heater-valve-kit-fits-5-8) ## Best For - old air products enthusiasts ## Why This Product - Trusted old air products brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Convenience:** Includes wire harness and rotary switch for quick installation and intuitive temperature adjustments. - • **Precision Temperature Mastery:** High torque servo motor delivers seamless, infinitely adjustable heater control for your perfect climate. - • **Seamless Coolant Flow Control:** Effortlessly regulate coolant flow to bypass the heater core and maximize your AC system’s efficiency. - • **Built to Last, Made in the USA:** Durable construction with American craftsmanship ensures reliability and long-term performance. - • **Ultimate LS Engine Swap Upgrade:** Specifically engineered to optimize heater performance in LS engine swaps—because your build deserves the best. ## Overview The Electronic Servo Controlled Bypass Heater Valve Kit (model 50-1555) fits 5/8" heater hoses and includes adapters for 3/4" hoses. Featuring a high torque servo motor, it offers infinitely adjustable control over coolant flow to regulate heater temperature or bypass the heater core, enhancing AC performance. Designed especially for LS engine swaps, it comes complete with a wire harness and rotary switch for easy installation. Proudly made in the USA, this 2-pound, 8x8x8 inch valve kit is a durable, precision HVAC control solution. ## Description Electronic Bypass Heater Valve w/ Wire Harness & Rotary Switch [50-1555] Fits 5/8" heater hose, withsleeve adapters for 3/4" Heater Hose applications (Requires 12 Volt) Allows complete control of coolant flow to regulate heater temperature and completely bypass the heater core to maximize AC system performance. Returns the water to the engine when in the closed position. Includes bypass heater valve with servo motor, wire harness and rotary control switch. Made in the USA !!! THIS BYPASS HEATER VALVE IS EXCELLENT FOR LS ENGINE SWAPS ## Features - High torque servo motors are infinatly adjustable to control heater temperature. THIS BYPASS HEATER VALVE IS EXCELLENT FOR LS ENGINE SWAPS ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Old Air Products | | Brand | Old Air Products | | Model | Heater Valve | | Item Weight | 2 pounds | | Product Dimensions | 8 x 8 x 8 inches | | Item model number | 50-1555 | | Is Discontinued By Manufacturer | No | | Manufacturer Part Number | 50-1555 | ## Images ![Electronic Servo Controlled Bypass Heater Valve Kit fits 5/8" Heater Hose #50-1555 - Image 1](https://m.media-amazon.com/images/I/71eDjnt-cmL.jpg) ![Electronic Servo Controlled Bypass Heater Valve Kit fits 5/8" Heater Hose #50-1555 - Image 2](https://m.media-amazon.com/images/I/61HicXPkYnL.jpg) ![Electronic Servo Controlled Bypass Heater Valve Kit fits 5/8" Heater Hose #50-1555 - Image 3](https://m.media-amazon.com/images/I/91I8y5vF7-L.jpg) ![Electronic Servo Controlled Bypass Heater Valve Kit fits 5/8" Heater Hose #50-1555 - Image 4](https://m.media-amazon.com/images/I/51VSuuRYrOL.jpg) ## Questions & Answers **Q: What size heater hoses is this product for?** A: 5/8" **Q: Does the valve have the ability to turn off all coolant flow to the heater core?** A: Yes, the valve does adjust from turning the coolant flow from full off to full on. Even when the engine is warmed up and the hose bypassing the core is hot the core is cold. **Q: How many turns is the knob lock to lock?** A: “Lock to Lock” the knob only turns 1 full turn from open to close. **Q: what are those red sleeves for?** A: The red sleeves let you adapt to 3/4" hose. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***. on May 3, 2020* ### ⭐⭐⭐⭐⭐ Review *by B***. on January 15, 2020* ### ⭐⭐⭐⭐⭐ Review *by K***Y on February 26, 2025* ## Frequently Bought Together - Electronic Servo Controlled Bypass Heater Valve Kit fits 5/8" Heater Hose #50-1555 - EVIL ENERGY 5/8" Heater Hose Coolant Radiator Straight 100PSI SAE 20R3 10FT Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/67665754-electronic-servo-controlled-bypass-heater-valve-kit-fits-5-8](https://www.desertcart.co.uk/products/67665754-electronic-servo-controlled-bypass-heater-valve-kit-fits-5-8) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-06*