| MANIFOLDS | AALBERTS INTEGRATED PIPING SYSTEMS LIMITED |
| ALIAXIS UK |
| DANFOSS LTD |
| FERNCO LTD |
| GEBERIT SALES LTD PIPING SYSTEMS |
| GEORGE FISCHER SALES LTD |
| Hep2O PUSH-FIT PLUMBING |
| OMNIE UNDERFLOOR HEATING |
| OSMA |
| PAM BUILDING |
| POLYPIPE TERRAIN LTD |
| REHAU BUILDING SOLUTIONS |
| UPONOR PLUMBING SOLUTION |
| WAVIN UNDERFLOOR HEATING & COOLING |
| MANIFOLDS AGREMENT CERTIFICATE HOLDERS | WAVIN UNDERFLOOR HEATING & COOLING |
| MANIFOLDS Fittings and Accessories | AALBERTS INTEGRATED PIPING SYSTEMS LIMITED |
| DANFOSS LTD |
| Hep2O PUSH-FIT PLUMBING |
| UPONOR PLUMBING SOLUTION |
| MANIFOLDS Flexible Pipe | GEBERIT SALES LTD PIPING SYSTEMS |
| GEORGE FISCHER SALES LTD |
| Hep2O PUSH-FIT PLUMBING |
| UPONOR PLUMBING SOLUTION |
| MANIFOLDS Hot and Cold Water Distribution | OMNIE UNDERFLOOR HEATING |
| MANIFOLDS Individual Radiator Supply | UPONOR PLUMBING SOLUTION |
| MANIFOLDS Pre-Assembled | DANFOSS LTD |
| MANIFOLDS Push-Fit | AALBERTS INTEGRATED PIPING SYSTEMS LIMITED |
| MANIFOLDS Underfloor Heating | DANFOSS LTD |
| GAIA CLIMATE SOLUTIONS LTD |
| Hep2O PUSH-FIT PLUMBING |
| MYSON |
| OMNIE UNDERFLOOR HEATING |
| OSMA |
| REHAU BUILDING SOLUTIONS |
| WAVIN UNDERFLOOR HEATING & COOLING |
