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Line 40: − + − <ol>+ − <li>The entire system is drained and closed off ahead of [[sub-zero temperatures]] </li>+ − <li>All pipework, pumps, filters and the cistern are protected from freezing during the winter </li> − </ol> − + − <p>Detailed inspection and maintenance advice can be found in [http://www.sustainabletechnologies.ca/wp/wp-content/uploads/2016/08/LID-IM-Guide-7.7-Rainwater-Cisterns.pdf Sustainable Technologies' LID I&M guide]. </p>+ − <p>The two primary operational concerns for RWH systems are:+ − <ol>+ − <li>A leak developing,</li> + − <li>Debris obstructing some part of the plumbing. </li> − </ol>
→Planning Considerations
*The [https://www.ontario.ca/laws/regulation/120332 Ontario Building Code (OBC)] regulates the use of harvested rainwater as one of many non-potable water sources. <em>"Rainwater means storm sewage runoff that is collected from a roof or the ground, but not from accessible patios and driveways."</em>
*The [https://www.ontario.ca/laws/regulation/120332 Ontario Building Code (OBC)] regulates the use of harvested rainwater as one of many non-potable water sources. <em>"Rainwater means storm sewage runoff that is collected from a roof or the ground, but not from accessible patios and driveways."</em>
*The [https://www.iccsafe.org/wp-content/uploads/110116-Draft-CSA_ICC-B805-Rainwater-Harvesting.pdf CSA standard] separates <em>"roof runoff"</em> from all other sources, including landscaped areas and green roofs. Collectively the green roof/landscaped and paved areas result in <em>"stormwater runoff."</em>
*The [https://www.iccsafe.org/wp-content/uploads/110116-Draft-CSA_ICC-B805-Rainwater-Harvesting.pdf CSA standard] separates <em>"roof runoff"</em> from all other sources, including landscaped areas and green roofs. Collectively the green roof/landscaped and paved areas result in <em>"stormwater runoff."</em>
<p>The current disparity between these two definitions affects all vegetated landscapes including green roofs. Confusion over terminology and regulation has been identified as a significant barrier to implementation of RWH since 2010[http://www.ryerson.ca/content/dam/water/education%20and%20outreach/GreenInfraTO/Identifying%20Barriers%20to%20Widespread%20Implementation%20of%20Rainwater%20Harvesting%20for%20Urban%20Household%20Use%20in%20Ontario.pdf].</p>
<p>The current disparity between these two definitions affects all vegetated landscapes including green roofs. Confusion over terminology and regulation has been identified as a significant barrier to implementation of RWH since 2010[http://www.ryerson.ca/content/dam/water/education%20and%20outreach/GreenInfraTO/Identifying%20Barriers%20to%20Widespread%20Implementation%20of%20Rainwater%20Harvesting%20for%20Urban%20Household%20Use%20in%20Ontario.pdf].
<h4>Cistern and Pipework</h4>
<h4>Cistern and Pipework</h4>
Cisterns must be installed in locations where native soils or the building structure can support the load associated with the volume of stored water. <br>
Cisterns must be installed in locations where native soils or the building structure can support the load associated with the volume of stored water. <br>
Expansion caused by freezing water will damage pipes, pumps and the cistern. There are two options for managing a RWH system in our climate:
Expansion caused by freezing water will damage pipes, pumps and the cistern. There are two options for managing a RWH system in our climate:
#The entire system is drained and closed off ahead of [[sub-zero temperatures]]
#All pipework, pumps, filters and the cistern are protected from freezing during the winter
The first option may be suitable for systems optimized for exterior irrigation only. But regulatory authorities may not permit the use of such seasonal systems as part of a storm water control strategy. Year round systems can be protected from freezing by locating the pipes, pumps and cistern indoors and/or below the frost penetration depth[http://www.raqsb.mto.gov.on.ca/techpubs/ops.nsf/0/ee1f1756eacc00e18525808200628fbf/$FILE/OPSD3090.101%20Rev%231%20Nov2010.pdf].
The first option may be suitable for systems optimized for exterior irrigation only. But regulatory authorities may not permit the use of such seasonal systems as part of a storm water control strategy. Year round systems can be protected from freezing by locating the pipes, pumps and cistern indoors and/or below the frost penetration depth[http://www.raqsb.mto.gov.on.ca/techpubs/ops.nsf/0/ee1f1756eacc00e18525808200628fbf/$FILE/OPSD3090.101%20Rev%231%20Nov2010.pdf].
<h4>Design for Maintenance </h4>
<h3>Design for Maintenance </h3>
Detailed inspection and maintenance advice can be found in [http://www.sustainabletechnologies.ca/wp/wp-content/uploads/2016/08/LID-IM-Guide-7.7-Rainwater-Cisterns.pdf Sustainable Technologies' LID I&M guide].
The two primary operational concerns for RWH systems are:
#A leak developing,
#Debris obstructing some part of the plumbing.
Planning can help ensure that these are identified and fixed more easily and cheaply.
Planning can help ensure that these are identified and fixed more easily and cheaply.
Example questions:
Example questions: