Bests & Worsts Reviews from Amazon

An inexpensive pressure reducer for drip piping. I would’ve actually preferred a model with pipe thread rather than hose thread, but with a few fittings, I worked it into my system. I have very high pressure in my sprinkler system (upwards of 80psi), so for the drip zones, I wanted something to step the pressure down immediately prior to the drip piping. These work perfectly. I only give the 4stars because it is plastic and I question the durability…. But for $5/each… who cares. It was difficult to tell if this product was going to work for my application because there seemed to be so many reviews of people who appear to be using this product for the wrong application. Therefore, I wanted to attempt to assist future buyers. A few notes: 1) This product is not meant to be left under a constant pressure load. Meaning, it should be installed on a side of your system where it only sees pressure when you’re actively watering. I suspect most of the failures noted in reviews are people who left it under pressure 24/7. 2) This is the big one: Many reviewers claim that the product doesn’t work because they hooked up a pressure gauge and saw now drop. Their observation is correct, but that doesn’t mean the product doesn’t work. Here is why: This product will not reduce pressure in a static system; it is a dynamic pressure reducer. Meaning, it uses hydraulic friction to reduce pressure. No water movement (static system) = no friction = no pressure reduction. This also means amount of pressure reduction seen will vary with the amount of flow being drawn. Which leads into the next note: 3) The manufacturer isn’t 100% truthful when they say that the product will reduce your pressure to 25psi. The unit is designed to reduce the pressure to that level under a very specific condition (a combination of input pressure and flow rate). However, they do not state what that optimum condition is. The only thing stated is a maximum flow rate of 20 gpm. All I can offer in this department is my observation that this product is taking a 80 psi input with a flow rate of ~1gpm (~100ft of drip piping with 0.9gph emitters spaced @ 18” on center), and there is no adverse effect to the drip piping. If it can work under those conditions, I think it’ll work for just about anything.