SKU: 24204999099

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

Sale price$74.70 Regular price$83.00
Save 10%

Pay in installments of $20.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 28 - Aug 2

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

4.7 ★★★★★
Based on 14 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Amazon Customer
Belleville, US
★★★★★ 1
Very cheap
Style: TREE
Very poor quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
B
Bennett
Los Angeles, US
★★★★★ 5
Charming Earring Display
Style: TREE, Style: TREE
I’m using this wooden jewelry tree as a display for my fun earring collection, and I love how cute and creative it looks! It comes in three pieces and is easy to assemble, though I did need a hammer to tap the pieces flush. I wish the earring holes were spaced a bit farther apart in some areas, but overall, it’s a charming and functional stand. Makes a great gift for any jewelry lover!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 3, 2025
S
Verified Purchase
SKZ
Pawtucket, US
★★★★★ 1
Not worth the money
Style: TREE
This is certainly NOT worth the money. It arrived broken and not worth fixing. Don't waste your money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
B
Verified Purchase
B.Nicole
Carnegie, US
★★★★★ 5
Perfect Drawer Organizers—Love the Assorted Sizes
Color: Clear
I really love these drawer organizers. The quality is great, and the assorted sizes are exactly why I decided to purchase them. I used a few inside my vanity to help keep everything more organized, and they work perfectly for separating smaller items without everything getting cluttered together. I like that there are multiple sizes included because it makes it easy to customize the layout for different drawers and products. One feature I really appreciate is the non-slip bottom. They stay in place well and don’t slide around every time I open and close my drawers, which makes a huge difference. The clear plastic design also makes it easy to quickly see where everything is without digging through the drawer making a mess. They feel sturdy and durable, not flimsy like some other organizers I’ve tried. I also like that they can be stacked when not in use, which helps save space. Best for: vanities, makeup organization, bathroom drawers, office supplies, and general home organization Overall, these are practical, well made, and really help make drawers look cleaner and more organized. Definitely happy with my purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
J
Verified Purchase
John Book
Charlottesville, US
★★★★★ 5
Clear, Stable, and Surprisingly Better Than IKEA
Color: Clear
I didn’t expect to be this impressed by drawer organizers, but the Vtopmart 25 PCS Clear Plastic Drawer Organizers really delivered. The non-slip silicone pads actually work — once placed, the trays don’t slide around at all, even when opening and closing drawers frequently. That alone makes a huge difference in daily use. What I love most is how much space they save while keeping everything clearly visible. The clear plastic makes it easy to find what I need at a glance, and the variety of sizes lets me customize each drawer instead of forcing everything into awkward layouts. All the organizers have a solid, usable depth, so items don’t tip over or feel cramped. Cleaning is effortless — a quick wipe and they look new again. Compared to IKEA organizers I’ve used before, these feel more practical, easier to maintain, and honestly more flexible. Add in the great price for a 25-piece set, and this feels like one of those simple purchases that quietly makes everyday life more organized and less frustrating.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2026

recommand products