---
product_id: 59095792
title: "Cycle Stop Valves CSV12540-3 Pump Control Valve, 1-1/4\" Threaded, 40 psi, 3 gpm Bypass"
brand: "cycle stop valves"
price: "£2.94"
currency: GBP
in_stock: false
reviews_count: 10
url: https://www.desertcart.co.uk/products/59095792-cycle-stop-valves-csv12540-3-pump-control-valve-1-1
store_origin: GB
region: United Kingdom
---

# Cycle Stop Valves CSV12540-3 Pump Control Valve, 1-1/4" Threaded, 40 psi, 3 gpm Bypass

**Brand:** cycle stop valves
**Price:** £2.94
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Cycle Stop Valves CSV12540-3 Pump Control Valve, 1-1/4" Threaded, 40 psi, 3 gpm Bypass by cycle stop valves
- **How much does it cost?** £2.94 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/59095792-cycle-stop-valves-csv12540-3-pump-control-valve-1-1)

## Best For

- cycle stop valves enthusiasts

## Why This Product

- Trusted cycle stop valves brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

The CYCLE STOP VALVE models CSV125 is a patented pump control valve that automatically adjusts pump output to match variable flow requirements. Downstream of the CSV1.25, pressure remains constant as long as demand on the system is between 1 and 25 gpm for the 1” and 2-50 gpm for the 1 1/4”. As flow rates vary, the valve inside the CSV125 moves closer to or farther away from the valve seat. This enables the pressure downstream of the CSV125 to remain constant regardless of flow.

## Features

- Max GPM: 50 GPM
- Preset Pressure Setting: 40 PSI
- Female thread

## Images

![Cycle Stop Valves CSV12540-3 Pump Control Valve, 1-1/4" Threaded, 40 psi, 3 gpm Bypass - Image 1](https://m.media-amazon.com/images/I/51SNFyynwuL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Excellent Technology
  

*by B***. on Reviewed in the United States on August 23, 2017*

This is probably the only solution to stop pump short cycling.  It also saves more money compared to traditional installations with large bladder tanks since it only requires a two gallon bladder tank.  The most important consideration is determining the correct cut-out pressure.  For example, if you select a 40 PSI cut-out, but your pump will only deliver a maximum pressure of 35 PSI, then the valve will not work properly.  If your pump will develop a maximum pressure of 45 PSI, then a 40 PSI Cycle Stop Valve would work fine.It will extend the life of your pump as an added bonus by significantly reducing the chance of motor thermal overload.SCADAbob

### ⭐ 







  
  
    This item did. Nothing to alleviate my problem
  

*by D***K on Reviewed in the United States on October 20, 2019*

This did nothing at all.  Installed exactly as instructed but pump cycled just the same.  Better to have just hired a pro to fix it right off the bat.

### ⭐⭐⭐⭐⭐ 







  
  
    Best shower times of my life!
  

*by N***. on Reviewed in the United States on January 8, 2019*

CSV - Cycle stop valve. Literally stops the cycling on and off of my pump. You would need this if you want constant pressure, and if you want your pump to cycle on and off a lot lesser than normal. Installation is pretty much simple, if there are leaks just need to add more rounds of teflon tape to the threads. I had 21 rolls on each ends and not have a single drip.

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**Shop now:** [https://www.desertcart.co.uk/products/59095792-cycle-stop-valves-csv12540-3-pump-control-valve-1-1](https://www.desertcart.co.uk/products/59095792-cycle-stop-valves-csv12540-3-pump-control-valve-1-1)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-16*