Wessel-Werk TK286 Air-Driven Central Vacuum Powerhead — Fits Vacuflo, Beam, Nutone & Vacumaid and more

Try the Wessel-Werk TK-286. Will need an adapter to fit the hose but it's awesome on stairs. https://www.amazon.com/dp/B096L2YGD1?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_3&th=1

I use the Wessel-Werk TK286 Air-Driven Powerhead with my SEBO for use on the stairs. It's the perfect width to make a single pass over each step. https://www.amazon.com/dp/B096L2YGD1?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_3&th=1