Click to expand Tap to zoom Danfoss AVTB Valve DN20 (DHW) 003N5075 by Danfoss - Original Spare Part AVTB Valve DN20 20-60 DHW Quantity Add to Cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted.