Publication Details

The Practicality of a Planned Preventative Maintenance Approach for Managing Sewer Blockages

This study identifies and quantifies the features of the various Planned Preventative Maintenance (PPM) approaches for managing the 350,000 blockages that occurring in the UK each year. The effective management of blockages first required the characteristics to be understood and this included demonstrating they are not random events. The use of Multiple Factor Analysis identified both static and time varying blockage correlations factors to explain the non-randomness, and this provided the ability to target PPM activities or explain performance changes. The use of SewerBatt to repeatable survey 50 sewers over a 6 month period showed blockages form when a set of circumstances occur following cyclical process of accumulation and erosion. The financial and non-financial features of the most common PPM approaches were quantified and the economic analysis completed, with the results being presented in an Intervention Hierarchy.The outputs from the study have been used to formulate a series of recommendations to improve the management of sewer blockages.



UKWIR Reference  16/SW/01/15Published Date 22/01/2016
Retail Price (£)  30ISBN  1 84057 806 8


Supporting Material and Reports

Appendix A - Literature review
Appendix B - Structured Interviews
Appendix C – Data Collection and Processing
Appendix D - Company Level Analysis
Appendix E - Single Factor Analysis
Appendix F - Multiple Factor Analysis
Appendix G - Intervention Analysis
Appendix H - Economic Analysis
Appendix I - SewerBatt Survey Results
Exec Summary