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Navigator MSL has launched the MAGBLU™ THORSYS 8M Heat Pump Circulating Pump – compact in size, powerful in performance. Specifically designed for heat pump systems, this high-efficiency pump delivers an impressive 8.1 metre head and 3.6 m³/h flow rate, making it ideal for demanding renewable installations.



Black and silver circulation pump with visible label, model APE25-6-80/TT. "MAGBLU" logo on top. Set against a plain background.


With a rare 135mm body, the THORSYS 8M offers exceptional output in a compact form – perfect for tight spaces without compromising on performance. It features 9-speed control, quiet operation, and energy efficiency with EEI < 0.21, all backed b

Leading distributor to the heating and plumbing trade Navigator MSL has launched its latest addition to its wide range of plumbing accessories – a brand new Shock Arrestor. It’s the optimum new mini expansion vessel that eliminates water hammer in heating and plumbing systems. Sold under the popular MidBrass brand name the Shock Arrestor is a mini expansion vessel manufactured from high grade 304 stainless steel and incorporates a WRAS approved EPDM membrane rubber diaphragm.


New Shock Arrestor

It’s rigorously tested for endurance and carries a three-year peace of mind warranty. It has been designed to operate comfortably at temperatures found in normal domestic heating systems – between minus 10 and plus100 degrees C. It reduces pipe noise and the risk of damage to system components. This unit should be fitted in close proximity to any appliance with rapid shut off valves and is suitable for potable water supplies.


It may provide a solution for installations of combi and system boilers, washing machines, showers, dishwashers and taps. Product specifications, including pressure ratings and pre charge pressure are etched into the surface of the arrestor so installers can quickly check that it is suitable for the intended system. All enclosed water systems have the potential to create a ‘water hammer’ effect in pipework where there is a sudden or repeated shut off. The MB shock arrestor is the answer to this problem. www.navigatormsl.com

Navigator is making its mark as the leading supplier to plumbing merchants across the UK. First Formed in 1934 the company is a wholly independent business, which focuses on providing an unmatched supply service to the plumbing merchant and distribution industry. Technical expertise is key to the company’s success and has steadily been built up over a long period of time, with many members of staff having more than 10 years experience and several senior personnel having more than 25 years.


Making Its Mark

The product range now boasts more than 4,500 lines and the supply chain expertise which has been developed within the plumbing metals sector has been successfully applied to ranges such as plastic pipe systems, magnetic filters, hand tools and plumbing consumables. It’s seen its major range of Pressfit fittings all independently tested and certified by BSI to BS EN 1254-7, the prestigious new kitemark certification. All Navigator Pressfit products are “M-type” and fully compatible when used with standard M type tools. The new BS EN 1254-7 standard incorporates far more rigorous testing procedures, including a standardised high temperature test, greater pull out resistance, updated requirements for seals, comprehensive requirements for threads and additional leak tightness for completed assemblies.


Making Its Mark

Kitemark products are audited and tested by BSI at least once a year, as is the production and quality process at the factory. The MB range is from Navigator’s Midbrass stable for water, synonymous with supplying quality plumbing parts for over 50 years. Suitable for chilled water and heating systems, MB Pressfit is also approved for potable water use by WRAS and incorporates black polymeric seals manufactured to BS 6920-1:2000. Navigator’s Salvus range is designed for use with gas and is easily indentifiable. It has a special high temperature yellow polymer seal conforming to DIN EN 549:2019.


There’s also a brand new product available to heating installers and plumbers – and like all great new ideas it’s simple. The Serpent is the new way to make flexible connections – particularly if you’re working in a restricted, confined space – or if its fully on display and you don’t want a mesh connector that quickly rusts or at best, loses its pristine look soon after fitting.


And it’s an all stainless steel construction product – so its reliable and does the job 100%. The Serpent has no inner liner to rupture or block, and even when the hose is bent to an acute angle, the full bore is maintained, resulting in perfect flow and much easier installation. The pressure rating and flexibility of the product has been successfully tested for leakage and pressure to BS EN ISO 1086:2023 which specifies a maximum test pressure of 31.5 BAR and a leak test of 1.5 times that pressure.


Making Its Mark

It’s NSF Regulation-4 approved for use with potable water and uses only WRAS approved materials, it comes in white and has a wipe clean outer cover. It can be bent and re-bent – it won’t split or snap. The fittings at either end – and there are a wide selection of these, both sizes and end connections - are stainless steel and easy to tighten and loosen. It’s a dream product and its available from all good plumbers merchants. www.navigatormsl.com

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