CALEFFI 533555H High Performance 20mm Pressure Reduction Valve, 100-600kPa Adjustable
SKU: 24204999099

CALEFFI 533555H High Performance 20mm Pressure Reduction Valve, 100-600kPa Adjustable

Sale price$74.70 Regular price$83.00
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

CALEFFI 533555H High Performance 20mm Pressure Reduction Valve, 100-600kPa AdjustableOverview The Caleffi 533555H 20mm 3 4" inline high performance pressure reduction valve is made in Italy and Australia Watermark approved. The "H" in the models name indicates this is a high performance version of pressure reduction valves in Caleffi ranges with a high temperature rating at 80C and a high inlet pressure rating at 2000kPa (VS standard Caleffi version at 40C and 1600kPa respectively). The valve body casting and dimensions are the same

Overview

The Caleffi 533555H 20mm 3/4" inline high performance pressure reduction valve is made in Italy and Australia Watermark approved. The "H" in the model’s name indicates this is a high-performance version of pressure reduction valves in Caleffi ranges with a high temperature rating at 80°C and a high inlet pressure rating at 2000kPa (VS standard Caleffi version at 40°C and 1600kPa respectively). The valve body casting and dimensions are the same between the H and standard Caleffi pressure reduction valves, but the cartridges are different. The comparison photos between the 2 models are shown in the photo gallery for your reference. The standard Caleffi pressure valve has the same model’s name of 533555 without the "H" and is sold also at my store at a cheaper price.

The Caleffi 533555H pressure reduction valve features a pressure adjustment range of 100-600kPa with a factory setting at 500kPa. Caleffi is one of a rare few manufacturers in Australia offering pressure reduction valves 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 alternatives 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 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 in-field 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. 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: 533555H
  • Specifications:
    • Flow Rate: 30L/min@100kPa; 120L/min@500kPa; 125L/min@600kPa
    • Maximum Working Temperature: 80°C
    • Maximum Upstream (Inlet) Pressure: 2000kPa
    • 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 internal diameter, refer to the BSP vs Physical Thread Measurement Table in the photo gallery
  • Material: DR Brass Body
  • Intended Use: Hot water heaters and special applications in high temperature or pressure situations
  • SKU: 533555H and 533555H-PRG

 

Package Contents

- Caleffi 533555H 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.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 24204999099

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.8 ★★★★★
Based on 1141 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
Joy
New York, US
★★★★★ 5
Build w/ a Friend, and BYOL (Bring Your Own Level)
Size: 4-tier, Style: wall mount&floor mount
Definitely a two-person job. Not because it's heavy, but a little awkward at first. I installed the first bracket, and my 12 yo assisted. Then, she hung the second bracket, and I assisted. Have a level handy. I didn't want to roll the dice and allow her to hang from the bracket, but it seems super-strong. We hung the brackets 32" apart, and 6" overhang, i.e. 48" x 12" laminate shelves. Gorgeous.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2025
S
Verified Purchase
Starling Bissette
Pawtucket, US
★★★★★ 5
Nice, sturdy kit...would buy again!
Size: 4-tier, Style: wall mount&floor mount, Size: 4-tier, Style: wall mount&floor mount
Purchasing this kit instead of each piece of pipe and fittings required was a no-brainer. It was especially easy because all pieces are prepainted. It went together with ease. Mounting was simple with planning, measurements, and a level. *Note* I purchase the pine stair treads from Home Depot that are 1" thick and then chemically aged them before adding polycrylic. It is cheaper than plywood and shelving boards, and a full 1" thick rather than 1x12 shelving.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2021
T
Verified Purchase
Tei
Alexandria, US
★★★★★ 5
Looks amazing!
Size: 4-tier, Style: wall mount&floor mount, Size: 4-tier, Style: wall mount&floor mount
Very straight forward to build. Mine was not hard but to a bit more effort because my ceiling is at an angle so I had to get a little creative. I cut a piece of wood and placed it between the ceiling and one of the arms for it to be even. It’s also not completely even cause I didn’t have a long level but still looks amazing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 12, 2023
J
Verified Purchase
Joyce Baker
Port Orchard, US
★★★★★ 5
Well made solid shelves
Size: 42 inch 2 Tier
Look exactly like picture. Very well made and easy to assemble!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
Y
Verified Purchase
Yvette
Battle Creek, US
★★★★★ 5
Very easy to put up and assemble!
Size: 48 inch 3 Tier, Size: 48 inch 3 Tier
We were looking for a nice shelf over our coffee bar, and this industrial pipe shelf was perfect! This was very easy to assemble! Simply put in your anchors and screw in the bases! We ordered the three tier shelf but only needed two, and it was very easy to make that adjustment! I loved that this was solid wood shelving rather than particle board.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026

recommand products