Tetraflow square line rainwater system black 112.5 down pipe bend

Tetraflow Rainwater Systems are designed for the conveyance of water in all new build, RMI (Repair Maintenance Improvement), industrial situations and gutter replacements.

BSI Kitemark Certification

TetraFlow’s popular products are manufactured to the most stringent quality guidelines under the BSI Kitemark certification.

QMS (Quality Management System)

TetraFlow is certified by the British Standards Institute to operate a ISO9001:2015 quality management system for continuous improvement.

Leading International Standards

TetraFlow’s product range is equivalent to the relevant BS, EN and ISO standards, which include:

BS EN 1329 / BS EN 1401 / BS 4514 / BS EN 1451 / BS 5255 / BS 4660 / BS 4576 / BS 4607 / ISO 3633

Raw Materials

TetraFlow uses the highest quality raw materials and chooses to work with superior raw materials and established suppliers. Our quality process starts with the inspection and testing of incoming raw materials.

• 65mm profile
• Attractive square profile
• High flow capacity
• High quality finish
• Square to round adaptors for easy connection to adjoining houses
• Suits all types of homes, conservatories and extensions