Average system costs = $95 per square foot. Average solar panel output = 10.6 watts per square foot. Average solar energy system costs = $8.95 per watt. In order to compare the solar energy costs to conventional hydrocarbon fuels, we must covert the $8.95 per into KWH.ince coal, oil, and gas can be measured on a cost per KWH, we should measure solar costs on a KWH basis. Some of the considerations for a solar energy system include the 20-to-30 year lifespan of the system and the hours of available sunlight.
Backwash until the water runs clear out the waste line. Usually about 2 - 3 minutes. You may need to add water to the pool before or after backwashing. On a D.E. filter, the last step is to add the fresh D.E. powder to the filter, through the skimmer. Also effective with D.E. filters is to backwash 2 or 3 times, for a total of 5 mins. Backwash for 2.5 mins, filter for 20 secs, Backwash for 1.5 mins, filter for 20 secs, Backwash for 1 minute, then back to the filter position. This removes more DE powder than just a single backwashing.
Monitor filter pressure as the filter may need cleaning during this period due to the accumulation of plaster dust. The filter can be set for normal operation with a Pebble Tec/Sheen pool. Do not swim in the pool until there is no longer evidence of plaster dust in the water and chemicals have been balanced.tart the pool equipment once the pool has been filled. Run the filter 18 hours per day for at least a week subsequent to plaster. Make sure that there is main drain suction to filter the dust from suspension in the water.