Helensvale Pool Shop and Mobile Pool Service Northern Gold Coast. Chlorinators, Pumps, Repairs and more. We service all residential & commerical pools and spas in Helensvale, River Downs and Montery Keys. Our mobile Pool Service includes: - Water health check . Northern Pool & Spa provides beautiful inground swimming pools for residential and commercial customers in ME, NH and MA. Northern Pool & Spa offers . Maine Pool Store. 291 Harold L Dow Hwy, Rt 236. Eliot, Maine 03903. Phone: 207-439-6800. Fax: 207-439-4443. Map & Driving Directions . Northern Pool & Spa, Eliot, Maine. 282 likes · 3 talking about this. Welcome to Northern Pool & Spa Family owned & operated gunite & vinyl liner swimming.