This model features an integrated strainer designed to protect the valve's internal needle and seat

also cross-referenced as the S1-027-01010-000 replacement core

For mid-sized furnace applications requiring high structural integrity

the 100208512 is the current manufacturer-designated replacement for both RLY2718 and RLY2718K

Wayne Combustion 21427-SER Blower Wheel 320788-702 This model features an integratedWayne Combustion 21427 SER Blower Wheel 3. 44"W x 4. 25" OD STD is an OEM combustion air component used in Wayne burner assemblies to maintain proper airflow and stable fuel ignition. This standard size blower wheel is engineered for balanced air delivery, helping the burner achieve the correct air to fuel ratio for efficient combustion and consistent flame performance. Contractors typically replace this part during burner servicing when airflow