What is the difference between this product and the Kingspan Flomaster Multibloc? Are they interchangeable? Thanks.

I would say yes, however check bar pressure on existing prv , also pipe arrangement may differ slightly.

what is the rate of pressure on the " cold water balance connection" Thank you

Reduces cold mains pressure to 3 bar

Can you tell me if the cartilage ( the red and black) on the pressure relieve valve model 533002CST fits 3/4" or 22mm?

Again if you are asking questions about working on a G3 pressurised unvented hot water system you best engage a G3 Water Safe Plumber.

Will this fit warmflow in180uv, part number 3664?

Good morning, After checking with our Technical Team they believe that this will fit the warmflow in180uv. Part number 3664 relates to "Caleffi 22mm 1 Piece O-Ring Type Multibloc 3/6 Bar 535001CST" Kind regards Sparesweb

Caleffi 22mm Inlet Control Multibloc Valve Group 533002cst

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

S$138

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to SINGAPORE.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Description

💧 Master your water flow with precision and style!

TRUSTED UK ENGINEERING - Caleffi’s renowned quality with CE certification, backed by 4.6-star user satisfaction.
VERSATILE INSTALLATION - Fits seamlessly in any setup with both horizontal and vertical mounting options.
PRECISION PRESSURE CONTROL - Accurate diaphragm design ensures stable water pressure, preventing costly damage and noise.
SCALE RESISTANT TECHNOLOGY - Innovative plastic stem housing reduces scale buildup, extending valve lifespan and reliability.
INTEGRATED MULTI VALVE SYSTEM - Combines pressure reducing, balancing, and relief valves in one compact unit for streamlined plumbing.

The Caleffi 22mm Inlet Control Multibloc Valve Group 533002CST is a high-performance plumbing valve engineered for residential hot and cold water systems. Featuring a pressure reducing valve, balancing port with check valve, and preset pressure relief valve, it ensures consistent water pressure between 3-6 Bar while minimizing noise and scale buildup. Designed for flexible installation and built with durable plastic components, this CE-certified valve offers reliable, maintenance-friendly operation trusted by professionals and DIY enthusiasts alike.

Specifications

ASIN	B016W7I5OM
Best Sellers Rank	12,865 in DIY & Tools ( See Top 100 in DIY & Tools ) 100 in Central Heating System Accessories
Brand	Caleffi
Country of Origin	United Kingdom
Customer Reviews	4.6 4.6 out of 5 stars (323)
Exterior Finish	Plastic
Inlet Connection Size	22 Millimeters
Inlet Connection Type	Compression
Manufacturer	Caleffi
Material	Plastic
Maximum Pressure	12 Bars
Model Number	533002CST
Number of Ports	2
Outlet Connection Size	22 Millimeters
Outlet Connection Type	BSPT
Size	22 millimeters
Specification Met	CE
Thread Size	M22x1.5
Thread Type	Compression
Unit Count	1.0 count
Valve Type	Multi Port Valve

Reviews

A**N

Good product

Great price, quick delivery and good quality.

11.12.2025

D**Z

Perfect Replacement

My Pressure Release Valve had started leaking in to the tun-dish on my old one and required a replacement valve. Just as cheap and easier to get on Amazon, so purchased and it arrived next day, fitted, and worked perfectly since then.

3.01.2026

A**E

Quality

Great product easy to install and price fair also.

6.01.2026

G**X

Excellent value

It was what I wanted no issues with the product.

13.03.2021

B**S

Well established, good quality valve for good money

These valves are great and this is a very good price

26.11.2025

K**H

Superb

Perfect drop in replacement for hp water tank valves

20.10.2025

I**N

Replacement valve

One connection is slightly shorter than on the original but managed to get it to fit.

23.10.2025

S**T

Nice

Good

12.11.2025

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews