Select DCVA or RPZ, read the loss at demand flow, lay out valves, relief drain and test connection, and see how 6 psi can turn a pass into a fail.
Backflow Preventers on Fire Lines: Losses and Layout Read More »
Ten checks for installing EV chargers, from supply capacity and load management to RCD type, open-PEN protection, cable sizing and commissioning tests.
EV Charger Installation: An Electrical Checklist Read More »
Choose cable glands from the cable’s real diameters, not its mm² size: sealing ranges, threads, IP, armour termination and earthing, materials and site tips.
Cable Gland Selection: Size, Armour, IP and Earthing Read More »
How to place air terminations with the rolling sphere and mesh methods, calculate the sphere sag between rods and the separation distance, with a rooftop example.
Lightning Protection Basics: Rolling Sphere and Mesh Method Read More »
How to select VRF branch kits (refnet joints and headers) by downstream indoor capacity, with a worked six-unit example and the installation rules that keep refrigerant flow even.
VRF Branch Kits (Refnets): Selection and Installation Rules Read More »
Why long SPD leads destroy the protection level, and the nine steps to wire a Type 2 SPD correctly: lead length, cross-section, back-up device and earth path.
How to Connect an SPD in a Distribution Board (the 0.5 m Rule) Read More »
How to lay out and set a PRV station for a building’s water supply: pressure zones, set pressure, sizing, parallel branches and commissioning.
Pressure Reducing Valve Stations: Layout and Settings Read More »
A practical MEP coordination method: freeze levels, budget the ceiling void, agree routing priority, model insulation and access zones, then run grouped clash tests with owners.
MEP Coordination: A Practical Clash Checklist Read More »
Where manual call points go, how high to mount them and how to check walking distance on the plan, with EN 54-14 practice and the NFPA 72 equivalents side by side.
Manual Call Point Placement: Distances, Heights, Exits Read More »
A step-by-step checklist for laying out a fire pump room: enclosure, access, heating, suction rules, discharge train, test header, controllers, diesel fuel and jockey pump.
Fire Pump Room Design Checklist Read More »