Uponor now offers a made-to-order Twin option for Ecoflex pre-insulated pipe systems. Ecoflex Potable PEX Twin products are available and made to-order with a 4-week lead time on standard orders. General terms and conditions apply. Ideal for hot and cold potable-water applications, Ecoflex Potable PEX Twin features Uponor AquaPEX (PEX-a) service pipe protected by multi-layer, closed-cell, PEX-foam insulation and covered by a corrugated, water-resistant HDPE jacket.