HONEYWELL DU145-3/4A DIFFERENTIAL BY-PASS VALVE 3/4" BSPM

  • Our Part No: 4200175
  • MPN: DU145-3/4A

£83.84inc VAT

£69.87 ex VAT

Plus P&P

Available in 5-7 days

  • Free UK Delivery

    On orders £90+ (inc VAT)

Why Choose DHS?

  • Browse more products from
    Honeywell Heating Supplies

  • Secure Express Checkout
    with a selection of payment options

  • 12 Month Warranty
    On all parts

  • The UK's #1 Heating Spares Supplier
    94% Rated Excellent/Good

HONEYWELL DU145-3/4A DIFFERENTIAL BY-PASS VALVE 3/4" BSPM.

The Honeywell DU145-3/4A Differential Automatic Bypass Valve is used to control the flow of water through bypass circuits which are installed between the flow and return pipework. They are typically installed at or near the boiler. Building regulations advice states that if a bypass is installed an automatic bypass valve must be fitted.

Features

  • 3/4" BSPM connection
  • Unique and simple adjustment mechanism
  • Wide differential pressure range 0.1 to 0.6 bar
  • Ensures constant flow through boiler
  • Reduces system noise and maintains an even system pressure

The HONEYWELL DU145-3/4A DIFFERENTIAL BY-PASS VALVE 3/4" BSPM is a genuine, brand new Honeywell Heating Supplies product, covered by a Honeywell Heating Supplies manufacturer's guarantee.

Not what you're looking for? Try our unique Spares Finder tool or you can view all Honeywell Heating Supplies products.

For advice on this or any product, please call us on 0330 123 3707, email us at web@dhsspares.co.uk, or see additional ways to contact us here.

At DHS we offer a range of product options to suit different budgets and requirements, while maintaining quality and reliability across all categories.

Below is an explanation of each product type available on our website. Please note that not all products will have all options available.

Unbranded Part

BEST VALUE

Unbranded Component Product. Genuine manufacturer component, but no branded packaging.

  • Sourced Directly from the Manufacturer
  • Supplied in Unbranded Packaging
  • Same Quality & Function as OEM Version
  • Cost Effective Alternative
  • 12 Month Warranty

Branded Part

ORIGINAL PART

Original Equipment Manufacturer Component with branded packaging.

  • Genuine Original Part
  • Sourced Directly from the Manufacturer
  • Manufacturers Official Packaging
  • Trusted Manufacturer Quality
  • 12 Month Warranty

Alternative Part

Compatible replacement parts sourced from a third party Manufacturer.

  • Lower Cost Replacement Option
  • Fully Functional Alternative
  • Appearance, design or materials may differ from the original part
  • 12 Month Warranty

Refurbished Part

Original OEM components that have been professionally refurbished.

  • Genuine OEM Component Professionally Refurbished and Tested
  • Environmentally Conscious Choice
  • Excellent Value for Money
  • 12 Month Warranty

Need Help Choosing?

If you are unsure of which product category is right for your repair or installation, our team is happy to help.

Contact us for expert advice on compatibility, pricing and availability.

Why buy from Direct Heating Spares?

There are many great reasons to choose us over our competitors!

  • Trading since 2006, we are the UK's top supplier of boiler and heating spares.
  • Official stockists for over 100 leading UK and European brands.
  • Over 20,000 parts stocked in our UK warehouse located in Chorley, Lancashire.
  • Competitive pricing with a secure checkout and a choice of payment methods.
  • We offer multiple options for delivery and collection.
  • Our team are available every day (excluding bank holidays) should you need support.
  • Generous returns policy of 30 days as standard.
  • We are passionate about giving back to charity.

We offer several delivery options, leveraging our long-standing relationships with trusted and reputable UK couriers.

We also partner with UPS to allow you to collect your order from over 3,000 Access Points across the country at your convenience, including local shops and newsagents.

The full selection of these will be shown at the Basket stage. Simply add your desired product(s) to your Basket and the most appropriate delivery options will be dynamically calculated for you.

Please see our Delivery Options page for more information.

We are proud to offer a generous returns policy of 30 days as standard to all online customers.

Please see our Returns Policy here for more information and exclusions.

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