Drain Spud For Whole House Humidifiers. This is the plastic fitting which attaches to the base of the housing of your humidifier. It is designed to allow for the connection of the 1/2" drain hose. Same as Aprilaire # 4223For use with these Models: Bryant:HUMBBSBP2412-A27HUMBBLBP2417-A24HUMBBLBP2217-A24HUMBBSBP2312-A27HUMBBSBP2212-A27HUMBBSBP2217-A24HUMBBSBP2317-A24Carrier:HUMCCSBP2412-A27HUMCCLBP2217-A24HUMCCLBP2417-A24HUMCCSBP2312-A27HUMCCSBP2212-A27HUMCCSBP2217-A24HUMCCSBP2317-A24Totaline: P110SPB2412P110LPB2417P110LPB2217P110-SBP2212P110-SBP2312P110-LBP2217P110-LBP2317ICP: HMICSB12BHMICLB17BHMICLB17AHMICSB12ALennox:HCWB3-12HCWB3-17HCWB3-12AHCWB3-17AWB2-12WB2-12AWB2-17WB2-17ATrane:THUMD200ABM00BATHUMD300ABA00BATHUMD200ABM00AATHUMD300ABA00AAAmerican Standard:AHUMD200ABM00BAAHUMD300ABA00BAAHUMD200ABM00AAAHUMD300ABA00AANordyne:91789709178630Maytag:91812709181280York:S1-BP5000MYS1-BP6000MYColeman:S1-BP5000MCS1-BP6000MCLuxaire:S1-BP5000MLS1-BP6000ML