According to the book Historical Sites of Warren County, the township was named for Theodorus Jacobus Frelinghuysen, a minister and theologian of the Dutch Reformed Church who came to New Jersey in 1720.
The typical 12' x 24' rectangular (288 sq.ft. of water surface area) concrete pool will cost around $72 per square foot.
99.5 % gunite pools in South have main drains. The few gunite pools that do not have a main drain were either built by diletants or main drain was deleted due to a leak on the return piping. Main drain is essential for proper function of any pool sweep cleaner of sand, dust, small debris, DE remnants, etc.