Quick fiire quick reference of answers to common questions about trade products and services.

UFH - Underfloor Heating

UFH pronounced as the three letter acronym U. F. H. is a colloquial term refering to any type of underfloor heating system.

RAL - Colour Space System

RAL is typically pronounced as a word "RAL" rather than the three letter acronym and refers to a colour from one of the three independant collections RAL Classic, RAL Effect and RAL Design. RAL is a worldwide colour standard used mostly in the varnish and powder coating industry. If ordering a powder coated product such as powder coated aluminium guttering you would need to specify the RAL colour finish.

SDS - Schnell Drilling System

SDS pronounced as the acronym S. D. S. stands for Schnell Drilling System. SDS was a huge step forward for drills trying to penetrate hard materials such as concrete. Hammer drills tend to be high frequency low impact, where as SDS has a bigger impact but lower frequency and thus a better material fracture rate. SDS drill bits have a standard slotted guage shank made specifically for SDS drills. If you upgrade from a hammer drill to an SDS drill you will need to purchase new drill bits.

Street Elbow

This is a plumbing fitting (copper or plastic) where one end of the elbow is actually a 'male' fit. The male end of the street elbow can be located within the female socket of another fitting.