The Terpco Sentry Drain Cover brings one man and one product to the work sight. Red rubber & clay requires four men and three products. The Terpco Sentry Drain Cover took a total of 30 minutes with an average cost of $1000.00 to prepare for this match. Red rubber & clay were up all night and had a staggering cost of $3800.00. That’s a difference of $2800.00!