The h2x Blog
We publish practical guides, top tips and trends, latest news, and more stories related to the mechanical, plumbing and fire industry.
Latest Articles
How to Calculate Residual and Static Water Pressure
Learn the difference between residual and static water pressure, how to calculate both through a plumbing system,...
Hydraulic Services Design Guide 5th Edition March 2022
The first part of the design guide focuses on Copper, with chapters on history, production, specification and...
UK – Domestic Mains Water Pipe Size Calculator
Welcome to this mains water pipe size calculator for the UK.
Hardy Cross Method – Sizing a Ring Main (FREE Spreadsheet)
Flow rate and friction loss in a pipe network system can be difficult to calculate. When the...
55% of Building Defects Attributed to Poor Design – are you at Risk?
A study found that human errors that lead to building defects are caused by: Poor workmanship; Poor...
How to Design Hot Water Recirculation Systems in High-Rise Buildings
Learn how to balance hot water recirculation systems, manage static pressure, position PRVs and design pressure zones...
Hot Water Recirculation Design in h2x
See how to set up, draw and calculate a hot water recirculation system in h2x, from design...
The Evolution of Design Iteration
New technology enables architects to regularly and quickly iterate a building layout as they receive feedback from...
H2X’s Revit / AutoCAD Integration
Our mission at H2X is to improve the quality of plumbing designs. When we started our journey,...
7 Important Steps for Designing Pressure Reduction Valves
It is important to size a pressure reduction valve (PRV) to suit the flow rate that passes...
Our Mission of Overcoming Plumbing Design Defects
Whilst this cost does not always get repaid by the engineer, the price is paid in a...
Designing RPZ Backflow Prevention Valves
As an example, if you were connecting a potable water supply to the HVAC system, this would...
Featured (Must-Read Blogs)
How to Calculate Duct Size for HVAC Systems
Learn how to calculate duct size from airflow, velocity and friction rate, with a worked example for...
What Are Cv and Kv? Flow Coefficient Formulas & Valve Sizing Explained
Learn how flow coefficient (Cv) impacts valve sizing. Explore their calculation, importance in fluid dynamics, applications, and...
Calculating Heat Loss: A Step-by-Step Guide
Learn how to calculate heat loss using U-values, surface areas, temperature differences, ventilation and thermal bridging.
Darcy-Weisbach Equation vs Hazen-Williams for Pipe Friction Loss
Compare the Darcy-Weisbach equation and Hazen-Williams formula, when to use each and how they calculate pipe friction...
How to Size Water Pipes
To size water pipes correctly is critical for the performance of your design. Below, we will explore...
How to Calculate Residual and Static Water Pressure
Learn the difference between residual and static water pressure, how to calculate both through a plumbing system,...
Highlights (Free Downloads)
Duct Sizing Chart for CFM, Velocity and Friction Rate
A duct sizing chart for round and rectangular ducts, showing airflow capacity and velocity at common friction...
FREE Pipe Volume Spreadsheet
Access h2x's free pipe volume spreadsheet to streamline calculations, optimise design, and enhance efficiency in piping projects.
Hardy Cross Method – Sizing a Ring Main (FREE Spreadsheet)
Flow rate and friction loss in a pipe network system can be difficult to calculate. When the...