--- product_id: 39829707 title: "Potter VSR-2.5, Vane-Type Waterflow Switch for 2.5-inch Steel Pipe, with Retard, SPDT Contact(s)" brand: "potter electric signal mfg us" price: "£217.39" currency: GBP in_stock: true category: "Potter Electric Signal Mfg Us" url: https://www.desertcart.co.uk/products/39829707-potter-vsr-2-5-vane-type-waterflow-switch-for-2 store_origin: GB region: United Kingdom --- # Adjustable pneumatic retard Activates at 10 GPM flow Steel build for durability Potter VSR-2.5, Vane-Type Waterflow Switch for 2.5-inch Steel Pipe, with Retard, SPDT Contact(s) **Brand:** potter electric signal mfg us **Price:** £217.39 **Availability:** ✅ In Stock ## Summary > 💧 Stay ahead of the flow with Potter VSR-2.5 — where precision meets protection! ## Quick Answers - **What is this?** Potter VSR-2.5, Vane-Type Waterflow Switch for 2.5-inch Steel Pipe, with Retard, SPDT Contact(s) by potter electric signal mfg us - **How much does it cost?** £217.39 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/39829707-potter-vsr-2-5-vane-type-waterflow-switch-for-2) ## Best For - potter electric signal mfg us enthusiasts ## Why This Product - Trusted potter electric signal mfg us brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Flow Activation:** Triggers instantly at 10 gallons per minute, ensuring timely water flow detection. - • **Certified Safety & Compliance:** UL Listed, FM Approved, and LPC approved for peace of mind in professional installations. - • **Dual SPDT Snap Action Switches:** Two single pole double throw switches for versatile and reliable signaling. - • **Built to Last Steel Construction:** Robust steel body engineered for long-term reliability in demanding sprinkler systems. - • **Customizable Delay with Pneumatic Retard:** Adjust the response time to prevent false alarms and optimize system performance. ## Overview The Potter VSR-2.5 is a vane-type water flow switch designed for 2.5-inch steel pipes in wet sprinkler systems. Featuring a durable steel construction, dual SPDT snap action switches, and an adjustable pneumatic retard, it activates reliably at flows of 10 GPM or more. UL Listed, FM Approved, and LPC certified, it ensures professional-grade performance and safety compliance for large-scale fire protection systems. ## Description The Model VSR is a vane type water flow switch for use on wet sprinkler systems. It is UL Listed and FM Approved for use on steel pipe; schedules 10 through 40, sizes 2" thru 8" (50 mm thru 200 mm). LPC approved sizes are 2" thru 8" (50 mm thru 200 mm).The VSR may also be used as a sectional water flow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a fl ow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period. Also known as -Potter Electric Signal Mfg Us 2.5 VANE TYPE FLOW SWITCH - PL-VSR25 ## Features - POTTER ELECTRIC SIGNAL MFG US Potter Electric Signal Mfg Us 2.5 VANE TYPE FLOW SWITCH - PL-VSR25 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00D3GZJ4K | | Best Sellers Rank | #399,625 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #104 in Flow Switches | | Brand Name | Potter Electric Signal Mfg Us | | Connector Type | 2.5 | | Customer Reviews | 5.0 5.0 out of 5 stars (1) | | Exterior Finish | Steel | | Inlet Connection Type | Flange | | Manufacturer | POTTER ELECTRIC SIGNAL COMPANY | | Material Type | Steel | | Model Number | VSR-2 1/2 | | Number of Ports | 1 | | Outlet Connection Size | 2.5 Inches | | Outlet Connection Type | NPT | | Size | 2.5 inches | | Specification Met | lpc approved | | Thread Size | 2.5 inches | | Thread Type | 2.5-inch NPT | | UPC | 785192014218 | | Unit Count | 1.0 Count | | Valve Type | Vane Valve | ## Product Details - **Brand:** Potter Electric Signal Mfg Us - **Exterior Finish:** Steel - **Inlet Connection Type:** Flange - **Manufacturer:** POTTER ELECTRIC SIGNAL COMPANY - **Material:** Steel - **Number of Ports:** 1 - **Outlet Connection Size:** 2.5 Inches - **Outlet Connection Type:** NPT - **Specification Met:** lpc approved - **UPC:** 785192014218 ## Images ![Potter VSR-2.5, Vane-Type Waterflow Switch for 2.5-inch Steel Pipe, with Retard, SPDT Contact(s) - Image 1](https://m.media-amazon.com/images/I/51oRR4Nn0VL.jpg) ## Frequently Bought Together - Potter VSR-2.5, Vane-Type Waterflow Switch for 2.5-inch Steel Pipe, with Retard, SPDT Contact(s) - Eastman Brass Swing Check Valve, 2 Inch IPS, Brass Plumbing Fitting, 20431LF - mxuteuk 2pcs HH52P DC 12V Coil 8 Pin 5A DPDT LED indicator Electromagnetic Power Relay, with Base, with DIN Rail Slotted Aluminum --- ## 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/39829707-potter-vsr-2-5-vane-type-waterflow-switch-for-2](https://www.desertcart.co.uk/products/39829707-potter-vsr-2-5-vane-type-waterflow-switch-for-2) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-18*