EVALUATION OF MANIFOLD METER CONNECTOR DESIGNS
FR0156

JAN 1991

SUMMARY

I OBJECTIVES

To investigate domestic water meter concentric connectors with respect to their basic design, jointing components and materials used, and to explore possible alternatives.

II REASONS

Concern has been expressed within the Water Industry about possible shortcomings in the concentric meter connections, particularly regarding the possibility of internal bypassing of the meter and the suitability of the metal thread form when used in plastic manifolds.

III CONCLUSIONS

IV RECOMMENDATIONS

V RESUME

Up to 100,000 boundary boxes a year are currently being installed at new properties and where new service pipes are fitted. The Water Industry has identified some technical problems in the operation of the connector between the boundary box manifold and the water meter. Problems of internal leakage and those associated with plastic thread forms are identified. A comparison of the connector design from manufacturers commonly supplying the industry is made. An alternative design has been proposed for consideration by the Water Industry and manufacturers. Suggestions have also been made on the way forward to develop a Water Industry Specification and for Quality Assurance Testing.

Copies of the Report are available from FWR, price 15.00 less 20% to FWR Members