Differing drain holes are available in the replaceable trough ends to suit specific site conditions:
- 30mm** is the standard hole
- 45mm hole is recommended for upland stony areas
- Notched corners suit very sandy soil
**Bungs are available for 30mm hole ends in order to enable the troughs to be used for water if necessary, for example, in freezing conditions. If being used to hold water the bolts on the ends will need to be sealed.