CALEFFI 533555 Inline 20mm Pressure Reduction Valve, 100-600kPa Adjustable
SKU: 93399475474

CALEFFI 533555 Inline 20mm Pressure Reduction Valve, 100-600kPa Adjustable

Sale price$74.70 Regular price$83.00
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Description

CALEFFI 533555 Inline 20mm Pressure Reduction Valve, 100-600kPa AdjustableOverview The Caleffi 533555 20mm 3 4" inline pressure reduction valve is made in Italy and Australia Watermark approved. The Caleffi 533555 pressure reduction valve features a pressure adjustment range of 100 600kPa with a factory setting at 500kPa. Caleffi is the one of only a rare few manufacturers in Australia offering a pressure reduction valve that can adjust to a pressure setting as low as 100kPa, which is required for specialized applications.

Overview

The Caleffi 533555 20mm 3/4" inline pressure reduction valve is made in Italy and Australia Watermark approved. The Caleffi 533555 pressure reduction valve features a pressure adjustment range of 100-600kPa with a factory setting at 500kPa. Caleffi is the one of only a rare few manufacturers in Australia offering a pressure reduction valve that can adjust to a pressure setting as low as 100kPa, which is required for specialized applications.

The pressure reduction valves are commonly installed in residential plumbing works such as after water meters or just before entering houses. The pressure reduction valves can ensure a stable water supply pressure supply, despite the fluctuations in the mains water supply pressure from the streets. 

The pressure reduction valves can serve as a more reliable and versatile alternative to more traditional pressure limiting valves, when used in hot water services such as electric, heat pump, gas storage and solar hot water heaters. The pressure reduction valve employs a membrane design inside with a stiff pre-loaded adjustable spring, opposed to a sliding piston mechanism found in a pressure limiting valve which often causes failures from clogging up. 

In real world installations, it is sometimes found that pressure limiting valves cannot limit pressures sufficiently in places where unusually high street mains pressures are present. This can cause troubles with ECV and PTR valves leaking on hot water services. The pressure reduction valves can be used in such situations and offer a far better pressure control from our infield experiences over the years in our own plumbing jobs in Brisbane. 

The pressure reduction valve comes with a BSP 6mm test plug inbuilt, where an optional pressure gauge can be inserted for pressure measurement at the outlet. The optional pressure gauge is shown in the photo gallery and can be bought for extra. It must be noted that the pressure gauge is only intended to be used as a measurement tool and must be removed after use, as it could rust inside out if left in a wet environment for prolonged periods of time. 

 

Technical Details

  • Manufacturer: CALEFFI, Made in Italy
  • Australia Watermark Approved
  • Model: 533555
  • Specifications:
    • Flow Rate: 30L/min@100kPa; 130L/min@600kPa
    • Maximum Working Temperature: 40°C
    • Maximum Upstream (Inlet) Pressure: 1600kPa
    • Downstream (Outlet) Setting Pressure Range: 100 kPa - 600 kPa 
    • Factory Pressure Setting: 500kPa
    • Optional pressure gauge can be inserted for downstream pressure measurement via the BSP 6mm test plug 
    • Extractable and serviceable cartridge with stainless steel filter mesh
  • Thread Size: 3/4" BSP (20mm) Female Thread (20FI x 20FI)
  • Physical Thread Measurement: 26.441mm, refer to the BSP vs Physical Thread Measurement Table in the photo gallery
  • Material: DR Brass Body
  • Intended Use: Hot water heaters and street mains water inlet into residential dwellings. 
  • SKU: 533555 and 533555-PRG

 

Package Contents

- Caleffi 533555 20mm 3/4" inline pressure reduction valve

- Package Weight 500g (620g with the optional gauge)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 93399475474

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Ricky Taylor
Waukegan, US
★★★★★ 5
How much my dog enjoys playing with it hours of fun
Size: Small Size
This is a very nice product.My dog has enjoyed playing with it very much.He really has a good time.That keeps him occupied for quite some time.A friend Of mine bought 1 for his dog and he enjoys it as well a very good product
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Reviewed in the United States on March 26, 2026
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Chelle333
Lowell, US
★★★★★ 1
Great turned to not so great
My Doberman (80 pounds in 7 months) puppy absolutely loved this ball. He loves anything noise making so this ball was perfect. Unfortunately, about 2 hours of nonstop play the cover was falling apart. There was no saving in. My pup is rough on toys and this one couldn’t handle it. I let him play without the cover for a little bit but the plastic is VERY hard. I’m not sure what type of plastic it is, but it’s very hard, no your average plastic. It was clunking around and banging into everything possible. I would love to give it more stars as it might have been perfect for other dogs, or maybe I just got a dud. But having to take the ball away from him was almost heart breaking. Those sad puppy dog ever and him looking everywhere for it. Barking nonstop because, well he want his ball….and being a puppy he is still learning. Had the cover held up for even 24 hours it would have been great. So I have a sad puppy and a lighter pocketbook. It was fun while it lasted.
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Reviewed in the United States on December 27, 2024
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katie
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★★★★★ 2
Lasted less than a week.
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Marc
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Amazon Customer
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Glowing Orbs can be fun.
My dog loves these balls. He can’t break them, which is hilarious. The fact that they glow and double as a cognitive toy when you hide treats inside is a huge bonus. My dog is literally darker than the night. We leave the ball near a lamp for 10–15 minutes, then take it outside and throw it. Watching a pitch-black blur sprint at full speed and suddenly seeing a glowing orb bouncing through the night is unreal. Great toy. Highly recommend.
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