Frequently Asked Questions
Topic: Sustainable Drainage
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- Can orifice plates be used instead of a vortex flow control device?
- Describe the differences between the 2 rainwater harvesting kits?
- How can a Waterloc 250 installation be designed to provide access to allow inspection of soakaway and attenuation tanks?
- How can a Waterloc installation be designed to provide access to the inlet pipe and allow inspection of the soakaway?
- How can silt and debris be prevented from entering soakaways and attenuation tanks?
- How do I calculate the size required for a single house infiltration system?
- How much storage capacity do the rainwater harvesting kits provide, in M3 and litres?
- How should stormwater be discharged into a Waterloc 250 infiltration system?
- In Scotland, If a developer wishes to provide private drainage, does it still need to be constructed to Sewers for Scotland 2 (SfS2)?
- It is recommended that an infiltration system is installed at least 1m above ground water table level. Why is this?
- Should attenuation systems with vented?
- There is a 1:3650 chance of a 10 year storm happening tomorrow. How is this probability arrived at?
- What are the design factors that should be taken into account when sizing an infiltration or attenuation system?
- What are the maximum flow rates for water entry using the different methods?
- What does the acronym SUDS stand for?
- What is minimum distance between a building and an infiltration installation?
- What is minimum distance between a building and an infiltration installation?
- What is PPG25?
- What is PPS25?
- What is the difference between infiltration and attenuation?
- What is the difference between the CIRIA and BRE methods of hydraulic design of an infiltration system?
- What is the function of the solenoid valve supplied with the USW200 rainwater harvesting kit?
- What is the key advantage of the Marley rainwater harvesting system?
- What is the main benefit of using our Flowloc vortex flow control device?
- What is the major benefit of Waterloc250 over other products?
- What is the minimum cover above the Waterloc 250 cells for areas subject to vehicular traffic?
- What is the minimum cover above the Waterloc cells for areas subject to vehicular traffic?
- What is the recommended material for a) Bedding? b) Side/backfill?
- What is the recommended maximum installation depth for Waterloc250?
- What is the recommended maximum installation depth for: a) Waterloc? b) Waterloc HD?
- What orifice plate sizes are available?
- What part of the Building Regulations in the UK relates to SUDS?
- What part of the Building Regulations relates to SUDS?
- What recommendation should be given regarding the depth of attenuation systems relative to ground water level?
- What recommendation should be given regarding the depth of attenuation systems relative to ground water level?
- What size mesh is fitted to the USW29 filter box?
- What size mesh is used in the filter used in the 250mm silt trap, USWST?
- What storm return period is required, according to the Building Regulations for the design of infiltration systems?
- What types of fabric/material are/is used with: a) an infiltration system? b) an attenuation system?
- What’s the main principle of SUDS?
- When designing attenuation systems for greenfield sites, what is the maximum allowable discharge rate generally required by the Environment Agency?
- Who dictates the flow rate into the downstream water course or stormwater system?
- Why should cell connectors be used?
- Why should I use cell connectors to connect Waterloc 250 cells together?
