diff --git a/backend/app/services/scrapers/domrf_kn.py b/backend/app/services/scrapers/domrf_kn.py
index d018cb6e..afdd6938 100644
--- a/backend/app/services/scrapers/domrf_kn.py
+++ b/backend/app/services/scrapers/domrf_kn.py
@@ -1142,7 +1142,7 @@ async def fetch_obj_checks(sess: BrowserSession, obj_id: int) -> tuple[Any, str]
 # ── _fetch_*_safe wrappers for asyncio.gather in Phase B/C ───────────────────
 # Каждый wrapper возвращает (kind, full_url, result_or_exception).
 # Exceptions НЕ raise — помещаются в возвращаемый tuple.
-# BrowserSession._sem (Semaphore(3)) bounds concurrency per-request автоматически.
+# BrowserSession._sem (Semaphore(_BROWSER_CONCURRENCY)=8) bounds concurrency per-request.
 
 
 async def _fetch_flats_safe(
@@ -1881,7 +1881,7 @@ async def run_region_sweep(
 
             # ── Phase B/C — per-object processing (resumable, parallel per-object) ─
             # Все endpoint'ы одного obj_id запускаются параллельно через asyncio.gather.
-            # BrowserSession._sem (Semaphore(3)) ограничивает одновременные запросы.
+            # BrowserSession._sem (Semaphore(_BROWSER_CONCURRENCY)=8) ограничивает запросы.
             # DB upserts выполняются последовательно после gather — один db Session
             # не thread-safe для параллельной записи.
             pdir = Path(photos_dir) if photos_dir else PHOTOS_DIR_DEFAULT
diff --git a/backend/app/services/scrapers/stealth.py b/backend/app/services/scrapers/stealth.py
index 53b1f635..b73112ce 100644
--- a/backend/app/services/scrapers/stealth.py
+++ b/backend/app/services/scrapers/stealth.py
@@ -31,6 +31,10 @@ USER_AGENT = (
     "(KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36"
 )
 
+# Максимум одновременных in-page fetch() на одну BrowserSession;
+# поднимали 3→6→8 под asyncio.gather fan-out, на наш.дом.рф ServicePipe WAF-tolerant.
+_BROWSER_CONCURRENCY = 8
+
 # Маппинг region_code → URL-сегмент города для реалистичного Referer.
 # Не обязан быть исчерпывающим — fallback на /новостройки/строящиеся/.
 REGION_LANDING_PATH = {
@@ -79,7 +83,8 @@ class BrowserSession:
     """Keeps a live Playwright Chromium page; issues kn-API fetches inside it.
 
     Use as async context manager. Concurrency is bounded by an asyncio.Semaphore
-    of size 3 (the same page can serve multiple concurrent fetches via JS-await).
+    of size ``_BROWSER_CONCURRENCY`` (the same page can serve multiple concurrent
+    fetches via JS-await).
     """
 
     def __init__(
@@ -104,7 +109,7 @@ class BrowserSession:
         self._browser: Browser | None = None
         self._context: BrowserContext | None = None
         self._page: Page | None = None
-        self._sem = asyncio.Semaphore(8)
+        self._sem = asyncio.Semaphore(_BROWSER_CONCURRENCY)
         self._request_count = 0
         self._warmed_up = False