Abstract: An automatic cleaning system for swimming pools connected to a source of fluid pressure and having a control system for allowing fluid to escape through the jets in predetermined cycles is provided. The cycling of the jets provides a sweeping action across the inner surface of the pool so that debris and sediment are progressively moved to the pool drain opening. The jets are used in conjunction with a fluid manifold system which permits the cycling to be accomplished. The fluid manifold system is conveniently fixed to the inner surface of existing pools near the water level and adjacent to the coping, or an in ground manifold system may be used in conjunction with in place wall fittings as in the case of new pool construction. The jets may be of an adjustable nature and may remain in a fixed position or allowed to oscillate.

Abstract: A seal member is provided for use in concrete wall form construction which sealingly engages with a form bore through which a tie rod supporting the seal member and spacer cones passes so as to prevent leakage of wet concrete from the form. The seal member of resilient material is asymmetrically supported on the tie rod by means of a seal bore within a slit along the length of the seal member. The asymmetric placement causes the spacer cones to overlap and abut the inner surface of the form walls so that they serve as spreaders for location of the wall forms.